The fans of this sport have about as much civility as a rabid dog with a missing leg, compliments of a wood chipper. If anyone dares to question its legitimacy, be prepared for lots of "what bitch!" or "get in the ring fucker!" or "I beg your pardon sir, but I have no other method by which to compensate for the fact that my 3rd grade teacher molested me. I hear by challenge you to an MMA duel."
You need only look at definition #7 for a prime example of this.
Towards the end of the Roman Empire, the Roman Senate instituted a policy they called "Bread and Circuses". They knew their government was falling apart, so they decided to keep people fat, dumb, and happy by making entertainment available to the masses. MMA defines this. It is the escape of every unskilled, uneducated slob to live vicariously through each fighter, living out every violent fantasy they've ever had stored away.
All in all, it's a bunch of testosterone laden douchebaggery, throw in some self-masturbatory chest beating, and you have right there, ladies and gentlemen, mixed martial arts.
In North America, the most popular promoter of this sport is the UFC (Ultimate Fighting Championship). In Japan, it is called Pride FC.
Person II: What's MMA?
I: Mixed Martial Arts!