Another way to say Jack Shit.
there are users on this website who do not know jack squat about writing a good definition.
by Light Joker May 21, 2004
Top Definition
Nothing, zero, zilch, nada, shit all. Possibly a short, fat man.
"I came out of that deal with jack squat."
"Here comes that prick, Jack Squat."
by chico del nacho September 19, 2003
absolutely nothing
I didn't win jack squat when i went to Las Vegas last weekend.
by Natalie September 20, 2003
not anything, absolutely nothing
I know jack squat about thermodynamics.
by piewire September 19, 2003
lack of knowledge
You don't know Jack Squat about anything
by Hoboken Johnny September 20, 2003
Something you don't know.
I don't know jack squats about music
by Mr13BF July 07, 2012
A stronger variation on the slang usage of "squat", meaning "absolutely nothing".

The origin of the phrase is unknown, but most likely it shares roots with the negatory slang usage of "jack".
"I get paid jack squat at my job."
by _Fabricated_ September 20, 2003

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