Top definition
(Sfff-millf)
Deriving from MILF, this term basically means a ...

Sister's
Friend's
Mum
I'd
Like (to)
F**k

This term was invented at Bosworth Waterpark, Leicestershire, when two boys noticed one of their sister's friend's mum was rather hot.
Joe #1: Hey, Joe look at my sister's friend, hott aint she?

Joe #2: Not bad, but check out her mum! shes hotter!

Joe #1: definetley!

joe #2: A bit of a sfmilf if you ask me...
by Jo.Zif June 11, 2007
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