What is Jack Squat?
1.
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."
2.
Another way to say
there are users on this website who do not know jack squat about writing a good definition.
3.
absolutely nothing
I didn't win jack squat when i went to Las Vegas last weekend.
See
4.
not anything, absolutely nothing
I know jack squat about thermodynamics.
5.
Nothing. Identical in meaning to
Your car's worth jack squat.
6.
lack of knowledge
You don't know Jack Squat about anything
7.
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."