A referee, or "ref" for short, is a person whose job is to ensure that the rules of a competitive event are observed and obeyed, or at least in theory. In reality, they are the scapegoats for any shortcomings that the players have and are generally treated like utter shit by both players and spectators alike.
Soccer Player: Dude, that referee was such a fucking piece of shit. Hey, nice call, fucker!
Person: Shut up. How would you like to try to manage a fair game, only to have half of the field scream vulgarities and death threats at you, then vandalize your car?
In a threesome involving 2 guys and one girl where the girl is penetrated both anally and vaginally the person who places his or her hands on the woman's taint to keep the gentlemen's balls from touching.
1. Someone who screws you over when all is on the line. These are the people not good enough to be atheletes themselves, so instead they must take up the pin-stripes and make bad calls upsetting everyone in a vengeful way. Disregard any "official" title around their name, because the only thing official about them is their rug-munching nature and horrid calls.