Definitions by JMGL

M.U.F.F. 

Mandatory Unattractive Female Friend. every group of 3 or more girls will have one, oftentimes in groups of two, there will be one one hot one, and one MUFF. for the MUFF, there is the wingman!

she's hot, but her friend is a MUFF

M.U.F.F. by JMGL February 16, 2004