fumf - fucked up motherfucker

Usually used if we are describing someone crazy or out of their mind.
John: Hey man! Did you see James?! He was driving 150 MPH on this short, narrow street!

Jerry: Yeah. He really is a fumf.
by Khorin April 21, 2008
Top Definition
short for f#!k you mother f*^$&r
'Man you suck'
'fumf, ill beat your ass'
by Angel,king of the mountain November 24, 2004
fat ugly mother fucker
hi you look very fumfy tonight
by buckbrook January 09, 2016
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