Usually a twixter, above legal drinking age, who buys beer for underage kids in return for admission to their parties. First mentioned in a Saturday Night Live Skit.
"You are such a lose, you live in your parents basement and you don't even have a job!"
"I do so, I'm an underage beer liaison!"
"I do so, I'm an underage beer liaison!"
by ED March 17, 2005