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
Extreame messup, "To fuck up something", to blow something (hahahaha not tht way You no waht we mean)
Oh watta Muff!!

Dude you muffed that pass!

by Lil Nait234 January 17, 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
Muff: muff is now a very rare species of vagina, it is BIG HAIRY SMELLY FLOPPY STRETCHED WORNO OUt fud, these "muffs" are a dieing species since the invention of mufficide or more commonly know as a brazilian, did you know? each day over 1,000,000 muffs are killed in humanly by being ripped of with boiling hot wax or with a razor or even sometimes laser surgery, you've all heard of save the whales, well now we have save the muff so please with all your heart vote no on mufficide even tho muffs are fucking disgusting lol
"oohh baby i can't wait till u put it in"*pulls down undies* holly fuck!!!!!!!! your 15 years old and u have a great big old hairy fucking muff... man it smells like someones gotten fish and deep fried it in poo u young attractive hagg!
by Sam_big_penis May 06, 2008
Basically when someone says something you don't like and you take your hand, place it over the other persons face and push it back with enough force to make their head go back
That guy said something about my girlfriend so I muffed the hell outta him....he strained his neck it was so bad.
by Chi-city High April 02, 2008

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