Top definition
Someone who has a large bum & in pants looks like they are wearing a nappy.
Equivelent to a females ghetto booty
look that at that boys bum in those jeans, now thats a nappy bum!
by hemmmm April 26, 2011
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2
Nappy Bum - is when a female is wearing leggings that don't fit and are too big, instead of being tight & fitted.

This gives the illusion that the female is wearing a nappy especially on the Bum area because the leggings are sagging.
She looks fineee..... yeah but she's got Nappy Bum, so forget that....
by SAMSKETCHSACH January 21, 2017
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