Someone who will go from one competing team to another based on how likely it is for one team to beat the other. This is not done pre-game, but during the game and usually occurs when the opposing team has a significantly higher score than the team they are currently in. This serves for the person to be outcast as a complete bitch-face-faggot-whore. Namely, a team whore. A whore for teams.
Team mate #1: Hey, where did Blanca go?
Team mate #2: Oh dude, she went to the other team.
Team mate #1: That fucking team whore. What a massive slut. I hope her tits lose all firmness and sag to her ankles.
Dude: Man, Blanca is such a fucking team-whore.
Man: Fucking hell dude, she did that to me last week, I am so going to break her fucking face.