To seduce an ugly girl so that your buddy can score with her attractive friend. This expression comes from the act of war-time bravery where a soldier would sacrifice himself to save his buddies. If you're out on the prowl with a mate and he is making progress with a fox, it is his friend's duty to chat up and seduce the pretty girl's ugly friend so that your buddy is free to leave with the hotty.
by Bradboy January 3, 2007