Frat Groupie means: A typical example of the pathetic A young female usually from the underclass who thinks that her self-esteem will rise if she is around frat boys all day. This las is usually surrounded by dirty frat boys all day. You will often see her parading through frat houses naked and probably drunk. They often get together with many of the coolest frat boys in one night and they are easy to have sex. They are almost always full of STDs. (in Community Dictionary, added by Mitchell Jenkins)