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3.
When someone is sucking you balls while you wank.
Man i got a mean kneebone last nite i kept punching her in the face by accident and then blew all in her eyes
by Dick Frizzle February 26, 2008
 
1.
enigmatic, puzzling.
The Mona Lisa has a kneebone smile.
by Towerful February 01, 2010
 
2.
When someone is sucking you balls while you wank.
Man i got a mean kneebone last nite i kept punching her in the face by accident and then blew all in her eyes
by Dick Frizzle February 25, 2008