Nothing builds up a fight more than a little heated discourse between the combatants.
And there have been some notorious ones over the years.
There have been many times where the trash-talk was more entertaining than the fight turned out to be.
Sometimes it gets personal and continues long after the fight.
Whatever the case, trash-talking is a part of the game. And, if you don't have thick skin, then you will fall victim.
Here are 25 of the best verbal rivalries in MMA.
After Frank Mir gave him his first loss in MMA, Brock Lesnar knew he had unfinished business with him.
The first fight was a controversial one with very questionable reffing benefiting the winner. When Lesnar worked his way up to stopping Randy Couture for the heavyweight title and Mir knocked out Antonio Rodrigo Nogueira for the interim title, both fighters were boiling over to meet each other in the cage again.
Both fighters traded heated words for months leading up to the bout. It was clear—this was personal.
After Lesnar knocked Mir out in the rematch at UFC 100, he taunted the fallen champ to his face and on the microphone. Lesnar later apologized to the UFC for his outbursts, but never to Mir.
Since his early fights in the UFC against Guy Mezger and Jerry Bohlander, Tito Ortiz and The Lion's Den never got along.
Mostly, it started when Tito Ortiz defeated Mezger in a rematch and sported a t-shirt that read "Gay Mezger is my bitch" while still in the ring.
Lion's Den leader Ken Shamrock did not take kindly to this disrespect, and the rest is history.
For years, both Ortiz and Shamrock criticized each other in interviews or basically any chance they got. But it wasn't until three years after the Mezger fight that the two would meet in the cage for the first time.
The trash talk was heated leading up to the bout, but after Ortiz beat Shamrock down for three rounds, the two squashed the rivalry in the ring.
Of course, that didn't last long.
A few years later, The UFC announced that Shamrock and Ortiz would take roles as opposing coaches on the third season of The Ultimate Fighter.
The two were in each other's faces for the entire season with some of the most personal and critical trash talk ever heard in sports.
Ortiz would stop Shamrock two more times following the conclusion of the show.
Both fighters still openly insult each other every chance they get.
The feud between Don Frye and Ken Shamrock started when Frye resorted to constant insults in an effort to goad Shamrock into taking a fight with him.
Frye later stated that he had wanted to fight Shamrock since he saw him beat Dan Severn at UFC 6.
The insults became very personal when Frye accused Shamrock of leaving his wife for a younger girl in her teens, and also stated that Shamrock's father and brother would be in his corner, not Ken's.
Shamrock became enraged and the two had to be separated numerous times before meeting in the ring. When they finally did meet, it was in the main event of the appropriately named PRIDE event "Bad Blood."
In a very competitive fight that saw both fighters take damage, Frye won the close-decision victory.
It is said that both fighters were never the same after this fight. Shamrock would decline greatly soon after, and Frye later claimed that his ankles were so messed up from Shamrock's ankle-lock attempts that he became hooked on pain-killers.
The fighters shook hands after the fight and are friends to this day.
Dana White was Tito Ortiz's manager before he took on his role as UFC president. But, the relationship became strained when Ortiz was champion and wanted more money for a fight with Chuck Liddell.
White could not play favorites as the head of an organization, though some do think he favored Liddell.
Ortiz refused to fight Liddell in an attempt to up his price, so White began publicly criticizing Ortiz for being afraid of Liddell.
Throughout the rest of the decade, Ortiz and White would have a constant public discourse criticizing each other, with Ortiz leaving the promotion multiple times.
Following Ortiz's loss to Lyoto Machida in 2008, White cut him from the UFC roster and claimed to be "out of the Tito Ortiz business."
A year later, however, White said that he and Ortiz resolved their differences and Ortiz was signed to a new contract with the UFC. They both claim to have a decent relationship today.
Leading up to their No. 1 welterweight contender match in the UFC, Josh Koscheck and Paul Daley consistently traded insults through the media.
Daley even went as far as to have a contest where fans would submit photoshopped pictures of Koscheck, planning to give the worst one to Koscheck himself at the weigh-in.
The insults didn't stop at the fight, as Koscheck held Daley down throughout the fight, punishing him on the ground, verbally and physically.
So upset from the words of Koscheck throughout the bout, when the final bell rang and Koscheck walked away, Daley walked up behind him and threw a left hook after the fight was over.
The punch did not connect with any power, but Daley was cut from the UFC for life immediately after.
As with any Josh Koscheck fight, the verbal warfare began as soon as the bout was signed. But, champion Georges St. Pierre would have none of it, choosing to ignore the challenger's attempts to get under his skin.
The UFC appointed Koscheck and St. Pierre as coaches of The Ultimate Fighter, with each episode featuring Koscheck insulting the champion and trying to get a response out of him.
St. Pierre always kept his cool, but members of his team and Koscheck's would clash multiple times because of the insults.
St. Pierre would have the last laugh as he broke Koscheck's orbital bone after a five-round unanimous decision win.
Leading up to his challenge to UFC middleweight champion Anderson Silva, Chael Sonnen insulted the champion, and everyone he was associated with, in every media outlet that would listen.
Sonnen claimed that Silva pretended not to speak English because he hated the media, that he wasn't a real fighter, and that this fight would be his going-away party.
ESPN even gave Sonnen's clever insults quite a bit of coverage for an MMA fighter who was not a champion.
Sonnen made good on his promise to beat up Silva for four-and-a-half rounds, until the champion submitted him with a triangle choke in the final two minutes of their fight.
It was sweet justice for the Brazilian, but the days of Sonnen's trash talk are far from over.
Leading into his bout with Michael Bisping at UFC 127, Jorge Rivera released a series of videos insulting Bisping in every way possible.
The videos and insults garnered a lot of interest for a fight that most people were not particularly excited about.
However, the plan backfired for Rivera as he took a nasty beating from Bisping, including a blatantly intentional illegal knee, and was stopped in the second round.
Following the win, Bisping ran to Rivera's corner and spit on his coach, then returned to his fallen opponent to disrespect him some more.
Bisping later apologized.
Former UFC light heavyweight champions Rashad Evans and Quinton "Rampage" Jackson were in each other's faces from the moment a bout between them was discussed.
The UFC decided to capitalize on the fighter's heated words by pitting them against each other as coaches on The Ultimate Fighter.
After numerous stand-offs and broken doors on the set of the show, The UFC had built up a much-anticipated grudge match. By the time the fight finally came together, it was a major event and did very good business.
The fight however was rather dull and Evans won a unanimous decision.
When Frank Trigg came to the UFC, many thought he had a very good chance to succeed Matt Hughes as the new welterweight champion. Trigg constantly referred to the title as "his" and belittled Hughes status as champion.
When the two met in the ring, Hughes get the best of Trigg, submitting him by rear-naked choke in the first round.
Trigg won two more fights and trash-talked his way into another shot at Hughes, again losing by rear-naked choke.
The two still do not like each other.
At UFC 100, former two-division Pride champion Dan Henderson was set to meet the brash season three TUF winner Michael Bisping.
The two were given spots as coaches on the Ultimate Fighter and Bisping immediately began trying to get under the usually stoic Henderson.
Bisping constantly tried to aggravate Henderson, who clearly was bothered but repeatedly stated that he would do his talking in the ring. And that he did.
In the second round of their bout, Henderson delivered arguably the most devastating one-punch knockout in UFC history, putting Bisping to sleep for minutes.
Bisping probably learned a valuable lesson about provoking people.
Both former training partners, the feud between Chuck Liddell and Tito Ortiz began when Ortiz was champion and he refused to give Liddell a title shot.
The back-and-forth banter between the two created a major event when they finally met at UFC 47. Liddell won by knockout in the second round and went on to become champion.
Ortiz later talked his way up to a shot at Liddell's title, but lost again by TKO, this time in the third round.
Their feud reached a breaking point a couple years later when the UFC pitted them as opposing coaches on The Ultimate Fighter in an attempt to make a third fight between them. The season of the show featured constant degrading from both, but Ortiz would pull out of the fight before the season was over, citing a neck injury.
The feud between Matt Serra and Matt Hughes began on the fourth season of The Ultimate Fighter, when Serra became irritated with Hughes' attitude. It led to Serra claiming Hughes to be just like every high school jock and a bully.
The UFC of course put the two together after Serra won the welterweight title to set up a major fight between the two.
After a season of Serra getting very personal with his insults and impressions of Hughes, the fight was canceled when Serra hurt his back. Still, the two would meet the next year after both had lost to St. Pierre, with Hughes winning by decision at UFC 98.
The beef between K.J. Noons and Nick Diaz started after Noons upset Diaz for the vacant EliteXC lightweight title in 2007.
The fight was stopped after the first round due to cuts on Diaz's brow, to which Diaz complained strongly about before walking out of the ring, flipping off the doctor and everyone else in the ring.
Diaz tried for the next year to get a rematch with Noons, but Noons would not accept. The beef boiled over after Noons defended his title against Yves Edwards and Diaz approached him int he ring to ask for a rematch.
A scuffle broke out between Noons, his father, and Nick and Nate Diaz.
EliteXC later stripped Noons of his title for refusing to face Diaz, but the two would meet for Diaz's Strikeforce welterweight title in 2010, with Diaz winning a unanimous decision.
Nick Diaz and Joe Riggs fought to a competitive and heated decision that ended up going to Riggs. Throughout the fight, both fighters traded words, along with punches.
After the fight, Diaz was still so irritated that he instigated a fight at the hospital while both were getting checked out from punishment they inflicted on each other in the cage.
Diaz ended up punching Riggs in the hospital after they both insulted each other. The two have neared a rematch numerous times since, but it never came together.
Prior to his highly-anticipated clash with Diego Sanchez, Nick Diaz criticized Diego and other members of The Ultimate Fighter cast for getting an easier path to the big stage in MMA, and not paying their dues.
Diaz said he would make an example out of Sanchez and prove that he was on a different level.
Both fighters traded words leading into the bout, but Sanchez proved his worth by pummeling Diaz on the ground and winning every round for a unanimous decision.
Diaz admitted Sanchez was a very good fighter after the fight, but still stated that he got an easy road to the UFC.
Initially, Diego Sanchez and Josh Koscheck were training partners. Sanchez was the more experienced MMA fighter, and Koscheck the better wrestler. But, after Sanchez beat Koscheck on the first season of The Ultimate Fighter, the two began to not get along.
Koscheck would complain that he won the fight, much to the annoyance of Sanchez.
The two both climbed the ranks in the UFC and continued to trade remarks degrading each other.
When both were nearing top contender status, the UFC matched them against each other at UFC 69. The feud became heated at the weigh-ins, with Sanchez shoving Koscheck nearly off of the stage.
Sanchez went on to look very ordinary in the bout and Koscheck won a unanimous decision.
It's hard to say where the beef between Nick Diaz and Jason Miller originated. Basically, it is just a difference in personalities.
Diaz had always been critical of Miller receiving extra attention due to gimmicks, and Miller just didn't seem to take Diaz seriously.
Then came the brawl in Nashville following Jake Shields' win over Dan Henderson.
Miller entered the cage and asked Shields when he was going to give him a rematch, and Shields' training partners, including Diaz, got into a shoving match with Miller then turned into a full out assault.
Since then, Miller has continuously called out Diaz to come to middleweight and fight him. The two also had a backstage altercation in which Diaz threw a water bottle at Miller and the two had to be separated.
Fans are still waiting to see these two settle their differences.
After Donald Cerrone and Jamie Varner battled to a technical split-decision that went to Varner after Carrone hit him with an illegal knee, the two could not stand each other.
Cerrone constantly berated Varner until he got his rematch over a year later.
The pre-fight talk was nasty, especially from Cerrone.
The second fight was an entertaining war with Cerrone winning a unanimous decision.
After then-lightweight champion Jens Pulver upset highly-regarded contender B.J. Penn at UFC 35, Penn wanted a rematch more than anything.
Pulver always resisted and soon after left the UFC. Penn could not respect this and it drove him mad.
After dropping two fights at welterweight in the UFC, Dana White talked Penn into moving back to lightweight with the assurance that he would get a rematch with Pulver.
The two coached against each other on the fifth season of The Ultimate fighter, one of the best seasons in the show's history, and met in the cage at the finale. Throughout the show, neither fighter could wait to get the fight on.
After controlling Pulver for the first round, Penn eventually submitted him in the second round, even holding on to the rear-naked choke for a second after the ref called off the fight.
The two squashed their beef after the fight.
As Dan Hardy was climbing up the UFC ranks, he goaded the better-known Marcus Davis into a grudge match to raise his stock in the sport.
Hardy went as far as to call Davis a fake Irishman and disrespect his skills.
Davis took the insults very personally and went into the bout with a very hot head.
After a close battle, Hardy had smashed Davis's face badly in the final round and was awarded a close decision. Davis debated the decision and did not want to accept Hardy's apology.
Tim Sylvia and Andrei Arlovski's rivalry dominated the UFC heavyweight division for years.
After they fought the first time, with Arlovski winning by first-round submission, Sylvia made it his goal to get revenge.
The two traded criticisms in the lead-up to the rematch, which Sylvia won by TKO. Sylvia then won the rubber match by decision just a few months later.
Since then, both fighters openly insult the other. Arlovski still expresses desire to face Sylvia today.
Josh Koscheck did not make too many friends on the first season of The Ultimate Fighter. And with Chris Leben, he made one enemy for life.
On one specific occasion, Koscheck antagonized a drunk Leben into punching out the front door. The when Leben went to sleep, Koscheck turned the water hose on his sleeping bag.
More nonsense ensued, but to this day you will never hear a respectful word out of either fight about the other.
Koscheck enjoyed seeing Leben knocked out against Anderson Silva. Leben enjoyed seeing Koscheck beaten by Georges St. Pierre, but was disappointed St. Pierre didn't stop him.
At one point, Wanderlei Silva and Quinton Jackson were the two best light heavyweights in Pride. Silva was the champion, and Jackson was the hungry contender.
The two would have to be separated from each other numerous times, with one notorious incident where Silva come into the ring after a Jackson victory and pushed the challenger, telling him it was his belt.
Silva fought Jackson twice in Pride, winning both by devastating knockout.
The two would later rekindle their rivalry in the UFC, but at this point Silva was not the fighter of old. Jackson knocked him out in the first round.