a bit like bum fluff. as a women gets to a certain age she begins to grow a moustache - similar to an adolescent boy. this gives them the 'let themselves go' look.
1) oh my god, your mum has let herself go, is that mum fluff i see on her face?
2 you should shave that off mate. you look my nan, she has mum fluff too.
by paddy 12345 October 12, 2009
6 Words related to mum fluff

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.