1 definition by Killleera7x

Usually a female friend of your girlfriend. You HAVE to get on with her for the sake of your relationship but she doesn't make it easy! She'll make sarcy comments, Make fun of you and demand to be everywhere that you and your girlfriend go.

Listen to "Big Fat Friend by Stephen Lynch" for more info :P
Guy 1: Oh hey did you end up getting with Rachel last night?

Guy 2: Nah her Big Fat Friend was there the whole night, Wouldn't fucking leave man

Guy 1: That sucks, just bring her a picnic basket next time!
by Killleera7x December 23, 2008
Get the Big Fat Friend mug.