Jack

A egotistical perversed man with an extremely small penis that uses large dildos. He thinks he wins every argument because he's Jewish, but really he's black.

Man:why does that guy have a small penis?

Jack:DIKINMABUT

by Man with a large penis October 14, 2015

Jack

A little Gay guy who likes to mess up guys bums

"Omg You are such a Jack why did you touch his butt"
"Dam Michael is such a Jack he touch Franks butt"

by YELADDY March 14, 2017

Jack

a cleaned-up version of Jackass. To be used in the company of children, in work-related emails, or when being lazy in texting. A term of endearment

Diana: Did you just hang up on me?
Todd: No, I hit the Ignore button
Diana: JACK!!

by D2212 October 18, 2011

Jacking

When one acts as though they know everything on the subject when in reality they know absolutely nothing on the subject.

Wow, Josh is really jacking right now, he knows nothing about boats.

by LargestPeen June 3, 2018

Jack

Rude. Likes to fight with people. Has a heart only for his best friends.

Hey it jack.

Run

by H&hitl June 3, 2017

Jack

Black.

Jack is black.

by Thetruth666999 July 25, 2016

Jack

A very small and drastically curved penis usually 7 inches or less.

Girl one: "Well why did you break up with him?"

Girl two: "He had a Jack!"

Girl one: "Thats just sad..."

by STiFFBASSiST May 16, 2012