Jacks are complete douchebags. They are always up in everyone business, and seems to think that they run the whole god damn world. They think they are funny, but the only person laughing is himself. If you ever meet a Jack, Im sorry. He is a try hard.
by SavannahHillz October 9, 2019
Get the Jackmug. 
Jack u
by Hello6479184 February 18, 2020
Get the Jackmug. (verb)
The act of masturbating while defecating on someone's chest, then ejaculating on the fecal matter once finished.
The act of masturbating while defecating on someone's chest, then ejaculating on the fecal matter once finished.
1. Timmy brown jacked Veronica after a big night on the town.
2. I walked in on him brown jacking his girlfriend.
3. All she wanted for Christmas was a brown jack.
2. I walked in on him brown jacking his girlfriend.
3. All she wanted for Christmas was a brown jack.
by RichardBachman August 5, 2013
Get the Brown Jackmug. 
an asshole just a real shitbag. so awful and all around a garbage guy. there is a reason people get called "jackasses". he is the reason. fuck off jack
by athofear September 18, 2022
Get the Jackmug. Performed like a jumping jack however more intense and while yelling out words like Lil' Jon. Intense jumping jacks with Lil' Jon like energy
Joe: *jumping jack* YEAH!!!
Joe: *jumping jack* WHAT!!!
Conrad: What are you doing?
Joe: Crunkin' Jacks!!!
Joe: *jumping jack* WHAT!!!
Conrad: What are you doing?
Joe: Crunkin' Jacks!!!
by Chipper 52 July 7, 2010
Get the Crunkin' Jacksmug.