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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

Words related to mum fluff

bum fluff facial hair granny moustache mum old