Trash talk is defined as insulting or boastful speech intended to demoralize, intimidate or humiliate someone.
In sports, it is very common for athletes to jaw back and forth at each other. They do it to try to get inside an opponent's head, to force them to make a mistake or lose their control.
In the world of mixed martial arts, that can be deadly, as you can quickly be knocked out or submitted.
Let's take a look at the ten greatest trash talkers in MMA history.