The act of not properly defining a word or action. The Actions or Words that cause a muff can have consequences. More of a Cincinatti term but has the same definition as "screwed up or messed up."
Usually when somebody says someone has a boyfriend or girlfriend and then does not to a friend. Causing the person who is looking for someone to be lonely for a night.
I muffed up last night
I muffed up last night
by muffer69 January 2, 2011
An ungodly hairy cooch. A word to use instead of "douche bag" or "pussy" when insultind another individual.
by G-Shizzle November 16, 2005
Boy 1: Hey, want to see something cool?
Boy 2: Yeah.
Boy 1: Muff.
Boy 2: Ah! What you do that for?
Boy 1: HA HA HA! You walked right into that one.
Boy 2: Yeah.
Boy 1: Muff.
Boy 2: Ah! What you do that for?
Boy 1: HA HA HA! You walked right into that one.
by Falap January 28, 2010
Mandatory ugly fat friend. Every hot girl you know in your life has one of these. They are often known has enforcers, body guards, and offensive linemen. Not sure the reasoning behind it, maybe the hot girls want to make themselves look better, but just always make sure you beware of the MUFF...
by J ROG809 October 4, 2010
This word is widely known as another word for a vagina. ALTHOUGH this definition states that the word muff is a shortened form of saying "motherfucker."
by SlamminMuff69 April 27, 2011
by HappyTimePrincess February 16, 2007
It is a surname. I think the name comes from Yorkshire and quite a few people from America have it as their last name!
by Anonymous Name April 1, 2007