A trademark for an outrageously cool titanium ring! Go to knucklenuts.com.
I'm getting me one of those KNUCKLENUTS rings!
by Ti Nuts September 27, 2006
A jack off. Or, ejaculation caused by masturbation.
"Quit being a knuckle nut and come help us". Or, "I had a knuckle nut in the shower this morning".
by TheParrott May 18, 2010
getting hit in the balls
Trever asked Bob to hit him in the balls for pleasure.
by Matt August 28, 2003
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