1 definition by UMW_Paul

frat mat

A girl who gets laid on by so many frat boys that she becomes one of their mattresses. Short for frat mattress.

Guy 1: I hear that girl's a total frat mat.
Guy 2: Maybe I should go take a swing at her...
Guy 1: Not unless you want hepatitis!

by UMW_Paul March 23, 2008