Someone who presents themselves as a wreck and a jackass at the same time
That guy at the gas pump wearing linen pant and flaring his hands around in anger is a wracket jack.
by LunaSteelpittburgher October 2, 2017
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When a conversation is being carried on by two people via Twitter and a third person takes over the conversation without being invited into it.
Suzy: Gracie, I can't wait for Saturday night! It's going to be an epic night.

Gracie: I know, Suzy! I'm about to wet myself with excitement!

Debra: Hey Suzy, Saturday sounds like it's going to be too much fun! Where should I meet you guys?

Suzy: Uh Gracie? Did she just twitter-jack?
by Thumper007 November 21, 2012
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A cheating pile of scum, who thinks he’s the shit. Ruins girls lives and gets cheated on by the girl he cheated with.
You’re such a tyler-jack
basically meaning “You’re a cunt
by lolshutup1111111 November 23, 2021
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This is when a guy/girl hasn't had the time to do his/her daily jack-off and is pent up and taking it out on others. If you are not a daily masturbater then this could also be used as "uncle jack hasn't come by this week/month"
"I'm sorry for being a jerk, uncle jack hasn't come by today and it has be all riled up"
by Wholeeyo October 8, 2021
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When you text a 'so called friend' a funny quote for urban dictionary and he puts it on there before you have chance.
"Yo Phil... Fully completely done me over yesterday bro he urban jacked my word man!"

Phil: "He completely urban jacked me the other day aswell!! God that boy has no banter"
by GRF10 December 15, 2010
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An insult worse than any other insult. Far worse than ur mom gay or ur dad lesbian. If said to u, u die.
Person 1: ur mom gay
Person 2: ur dad lesbian
Person 1: ur uncle jack a necrophiliac
Person 2: *Dies*
by Nick Dimeson May 5, 2018
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