Top Definition
Pronounced: Nidd or N, I to the Double D.

NIDD is an abbrevation for a Knee Dweller( a girl that likes to spend a lot of time on her knees)

Also used for Knee dwellers in training( young girls that will be playing the flesh flute in a few years, but just don't know it yet)
You and your friend hook up with the same girl on several occasions, but she don't give up the butt, only heade.. classic NIDD
by Willy Wankerrr April 27, 2009

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