No two people are the same—not in life, and certainly not in the Ultimate Fighting Championship.
The UFC is home to nearly every appearance a mind can imagine, which includes but is not limited to the nice guys, the fighters who keep to themselves and, of course, the mean ones.
Simply taking a look at many of these fighters will send the hairs on your neck straight up in the air.
Whether these specific fighters have a mean personality doesn't matter, as they are downright mean-looking.
The following slides display the 20 meanest-looking fighters in the UFC.