The act of chilling, especially on a Sunday with a hangover.
I hit it way too hard last night, I need to jack on the sofa.
by smash101 October 20, 2013
Adjective:The state of being an immature, arrogant, prick.

Verb: "To pull a jack" is to get way too "handsy" early on in a date. This then followed by a drawn out, idiotic grudge.
"Dude, he was SUCH a Jack last night!"
or
"OMG! He pulled a total jack on our FIRST date! I dumped him"
"Is he still pulling a jack on you? It's been over a year."
by screwyoujack June 15, 2013
An abbreviation for hijack; to steal, or to take something you are not supposed to take.
Victim: What happened to the book I was reading? It was right here on my desk.

Sidekick: Somebody 'jacked it.
by semantic historian May 21, 2013
someone who always calls or texts you asking you to come out or go round his house and play PlayStation with him.
someone who you don't want to hang around with because he is boring, lame and just embarrassing yet always wants to hang around with you (probably cause your a Chris).

quite a smart kid but seem dumb. not good with girls always shies away and becomes nerves when a girl talks to him.
Jack: hey chris you are so awesome do you wanna come round and play gran turismo on my ps3?
Chris: sorry man ive got plans, im going to meet my day.
Jack: oh then, how about tomorrow?
Chris: i cant im staying round my dads tonight.

Sarah: hey jack
Jack: hhh.. hi.
Sarah: you alright?
Jack: yyeah, i.. gotta go now.
by who you wanna be February 25, 2013
A pretty cool guy, who's well-known as player. His full name is actually Jack Sparrow. If you ever see him, you should try to get his autograph immediately.
A: Dude man, who's that?
B: He's Jack, Jack Sparrow.
A: Dude, I gotta get his autograph
by unstoppableyolo January 01, 2013
Acronym for Just Another Confused Kaffir.
"Hey you JACK, I told you to cut the grass, not kill the grass"
by White Terror December 16, 2012
Massive cock, very caring, strong and trustworthy
by Alix jackson August 15, 2012

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