short for jackhammer, j-ham is a term used for a person of incredible and immeasurable coolness
Guy 1: " Who is that guy over there?"
Guy 2: " Thats Joe, he's a j-ham"
Guy 1: " Excellent"
by Yupman December 2, 2009
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To jack off or to beat during a class or session
Kid 1: Did you hear about that kid in third period?
Kid 2: No, why what happened?
Kid 1: I heard he pulled a J. Ham and got caught
Kid 2: Ewww! Gross
by Tommie The Tomahawk March 18, 2011
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Often underestimated.

A diaper sniper of sorts.

Tag along boyfriend
One who never leaves his girlfriends side
Derek: Hey Joe, you wanna go hang with the guys tonight?

Joe: I can't unless my girl can come.

Derek: Come on quit being a J-Ham
by MillvilleHooligan March 26, 2018
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