Someone who, like a good soldier, will hop on a "grenade" (ugly girl) and take all necessary damage from said decision to ensure a buddy can score with said grenade's much more attractive friend.
SIDE NOTE: Bonus points if you get a BJ and her name is dyke-ish, like Becky or Barbara but goes by Barbie or something much sexier.
JJ: Look at that blonde over there.
Adam: Yeah, but her friend is fugly.
JJ: You owe me man.
Adam: Dammit, I'll be the Grenader.