When your going down on a girl and you find out she hasnt shaved her pussy in years.
Guy 1: Yo did you get with that chick last night?
Guy 2: Yeah man, but I'm still trying to get hair out of my mouth.
Guy 1: Why?
Guy 2: She had one hairy muff.
An alternative to the expression 'fair enough'. Often said as a dismissive response to an explaination of something. Hairy Muff indicates that the person saying it does not really care about whatever it is they have been told. If said quickly enough the person it is said to may not even be aware that you have in fact referred to an ungroomed vaginal area. It is not often used in formal and/or serious conversation although it is somewhat amusing to test the acceptable limits of the phrase.
Example 1 Ben: The reason I haven't been out picking up chicks lately is because I realised that I was ignoring my true sexuality. I wanna be with Carl. I think I'm gay.
Ned: Hairy Muff.
Example 2
Dale: I think I'm going to kill myself!
Ned: Hairy Muff.
Cockney rhyming slang for 'fair enough'. i.e. hairy muff - fair enough. As with most Cockney rhyming slang, the rhyme is usually shortened to just the first word - "hairy"; hairy (muff). Originates from Orpington area of South East London suburbs.
"Can I borrow a quid?"
"Nah sorry, need it for the train."
"Hairy (muff)."