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

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

Jack

Jack are the biggest cunts ever, no jack is cool and they have no friends and are probably adopted.

his name is probably jack

by Cuntname October 25, 2016

Jack

A self centered jerk, is very ugly and not a very good person or friend to you. He doesn't think much of others.

Come on! Don't be a Jack!

by Lynsey Lover July 28, 2012

Jack

The most amazing guy on the planet. Jack makes you feel warm inside. He is short but athletic. He’s attractive when he’s not trying. He will take the time to slow down the conversation and start “small talk” he hits the ball out of the park when it comes to getting girls. They are all over him. He may not be the smartest but he is The cutest!!! He’s my boyfriend!

Girl 1: He must be a Jack
Girl 2: YA MY JACK BACK OFF SISTER

by NoNoHoney December 20, 2017