Top Definition
when you or someone close to you has abnormally low hanging balls and you proceed to dribble them against a hard surface and slam dunk them in their navel
you boys ready for the big slam junk competition tonight!?
by Ice Kingz January 04, 2011
1 more definition
A variation on a handjob, a slam junk is performed by jumping in the air with your arm outstretched, then slamming your hand, masturbation-style, onto the recipient's dick as if dunking a basketball. The more preferable variety of this position is performed with the recipient at a slightly higher elevation of 10 feet, although this is optional.
Yo, man, go lay down up there and I'll give you a slam junk!
by ACID13X February 29, 2012

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×