Kickboxing is a Full contact sport in which two guys will kick each other's asses using all of their bodies as opposed to just their hands.
Martial arts commonly used in Kickboxing are: Karate, Muay Thai, Choy Li fut (or Choy lee fut or choy lay fut), or Sanda (or Sanshou).
Person: ooh, because Boxing isn't dangerous enough let's include kicks, knees, elbows, and clinches too! we'll call it kick boxing!
Person 2: Good Idea!
Later in the hospital:
Person 1: We could make a fortune off of this!
Person two: Uggghhhhh