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2.
To have anal sexual intercourse with a woman, (or man) after the reciprient has moved their bowels, (took a shit). Taking out your penial extention and slapping the victim in the face with the dirty cock. See.. (Tony danza)
Did you see dat trick after I gave her dat nasty williams.
by John Palmer May 23, 2003
 
1.
aka Serena Williams, an extremely butch female tennis player.
I was so bored bored I watched womens' tennis last night.

Who was playing ?

Williams vs Sharapova.

Which Williams ?

Nasty Williams.
by Demarates May 02, 2006