awesome. yet sometimes annoying. cool brother. pain. good listener. half trustworthy. i love him
"ohhh emmmghee, he's such a jack!"
by christophermbr August 17, 2009
Its an action of pulling a super slick CIAish move like Jack Bauer from 24. When you pull a Jack its something amazing that will save your or the whole world. When you Jack it means that you have just made a BEAST move or you have achieved superiority. When you pull a Jack it means that you have gotten yourself out of something that no one else could've except for Jack Bauer-Kiefer Sutherland
Wow he went all Jack on his ass
Yeah dude you just wonder why the police keep chasing him
I don't know all i know is man he is amazing
Yeah he always pulls a JACK
by beast23chicago March 28, 2009
Phone Booth
Yo my nigga imma call up them fly honeys on them jacks
by NuMbA1StUnTa December 06, 2008
the diminutive form of john or jackson

usually the coolest guy ever.
Jim: "dude Jack is such a bad ass"

Joe: "hell yeah"

by sprit they're gone August 28, 2008
A derogatory term which people from Cardiff use to describe people from Swansea, in South Wales. Etymology: stems from "Swansea Jack" a dog who assited in the saving of several dozens of persons from various drowning situations by barking loudly from the beach/docks and thus drawing the attention of passers-by who were able to really help.
Cardiff supporter: "Fuck me, I can't believe those soddin' Jacks are back in the Championship!"

Graffitti in toilet of The Woodville pub in Cardiff "Kill all Jacks!"
by Mr Snail April 17, 2008
Set of nice titties. A pair of boobs.
Whoah, that broad had a set of jacks on her!
by Rosenburg July 11, 2006
An asshole who loves to troll and games a lot. He sounds like pewdiepie. He is mean, obnoxious, gay, and he gets butt hurt quickly.
Me: Damn. I just saw another Jack today.

Friend: That must suck to run into a Jack.
by Tokyo Ghoul April 04, 2015

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