Acronym for Manditory, Ugly, Fat, Friend....every girl has that one FAT friend that they always hang out with.
Man that chick is hot...yup, theres the M.U.F.F.
by Anonymous May 04, 2003
The meaty part of the vagina.
The flabby parts of the vaginal wall that flap around during sex. It could arouse you or it could make you feel disturbed. This is the Muff.
by PeePeeSucker+analLover69 July 08, 2016
A goof or a silly person.
"what did the nose say to the hand?... SMELL YOU LATER!!!"
"...oh jeez, you're such a muff."
by MomosneakyXP April 15, 2010
Anything of reference to a vigina
"dude, in that three some there was so much muff, like if the great wall of china was made of muff. That much."
by ASSCUNTBALLSMUFF February 13, 2010
When someone says or does something stupid you apply the MUFF. Can also be applied via a braced MUFF. Taking your index finger and middle finger putting them together and applying pressure behind the idiots ear(just along the hair line) and pulling/swiping towards yourself catching they're ear. And hopefully achieving a snap noise and a disgruntled look of confusion from the receiver of the MUFF.
Guy: I think Larry the Cable guy is fricken hilarious...
Friend of Guy: Holy shit dude. I think you got a MUFF comin...
Guy: What? He's really funny.

Friend of Guy: Applies his index and middle fingers behind Guy's ear and swipes that shit... Achieving a loud snap sound.

(Guy then realizes he was being an idiot and apologizes for saying Larry the Cable Guy is hilarious.)
by Johnny Reds February 16, 2009
a muff is a Mandatory Ugly Fat Friend
all hot girls have a muff friend and the hotter the girl the bigger the muff shes with
damm that girl is sexy but ewwww look at her muff

dan.w rocks lol
by dan.j.washington January 24, 2009
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