look up any word, like bukkake:
 
15.
masturbating while taking a shit
I just took a jack shit
by TknucksSucks November 01, 2010
 
16.
A poker hand, especially in Texas Hold 'Em, that includes a jack and an unsuited card under 10.
I'm gonna raise you and go all-in even though I have jack shit. Or, Aw, you're bluffin' me, I bet you have jack shit so I call.
by stinkygordo October 07, 2008
 
17.
when you are taking a shit and getting a handjob at the same time
what'd you do last night?
Jack shit....
Oh that must've sucked...
No... no sucking... just a handjob
by jackshit March 04, 2008
 
18.
the feces of a jack, i.e. a jackass. By extension, anything worthless or trivial.
You don't know jack shit.
by bumpie January 22, 2006
 
19.
1. jack rabbit feces.

2. something plentiful and omnipresent, yet nonetheless worthless.

3. nothing, or nothingness
(see jack squat)
"This here jack shit ain't worth jack shit."

Incorrect: "He don't know jack shit."
Correct: "He knows jack shit."
by Joe Bone March 11, 2005
 
20.
A term to describe someone who has or will inevetible do something stupid
Man, you are such a jack shit!
by KROD December 13, 2004