A fight issued between a man and a woman, often out of anger or frustration upon their counterpart. Demonstrated by the continual, often repetitive assault of one's pelvis against the other's. This act can be carried out with or without clothes on, but is more effective when nude. If done properly, neither opponent should be able to stand.
In a pelvic fight it is difficult to determine the winner. The one standing at the end should be the winner. However, if done properly and unable to move or stand, the winner is the one who ends up on top or in the more dominant position you end up being in.
If there are more than two combatants in this pelvic fight, then you must have a process of elimination, similar to the Super Bowl's tournament methods, up til you have two combatants going for the gold.
Did you hear about Britney Spears ending up in the Mental Ward? I bet she'll miss all the random pelvic fights she used to get into.
The Thunder Down Under group must have several homosexual pelvic fighter champions of the world.