A sport where many ppl who study different types are martial arts come together to fight to see who's better. You have stand-up work, which is the martial arts like Tae Kwon Do and Muai Thai, then you have ground work like wrestling, grappling, and Jiu-Jitsu. It's a painful and dangerous sport, but anyone who tries will learn respect and strength. Plus you'll be one BAAAD mother fucker. XD
Mixed Martial Arts fights are UFC style fights and things like that.