The act of punching in the face, knocking someone out, or hurting someone in another manner
Coach Paffenroth during film session: What are you laughing at Egan?
Egan: Mondo's Tattoo of the Incredible Hulk
Coach Paffenroth: You think thats funny... (break clip board over knee) I'll jack-u-up!
by madaket06 January 6, 2010
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An "up jack" is when you ejaculate into your own face and rub the semen into your nostrils.

You can up jack someone else by grabbing their penis and causing them to ejaculate into their face, at which time you rub the semen into their nostrils.
Oh man, I up jacked so much last night that everything still smells like my seed.
by Thadeous January 16, 2007
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"yeah me and tina was jacking jill up the hill last night, and she made it all the way to the top, and I came right right after her"
by Naruchico August 27, 2007
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A stupid manuever made in a car by a driver that causes major body damage when an accident occurs.
That guy really tore up jack on his car. when he drove off the road.
by Little Retard November 3, 2005
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The ultimate source for knowing anything about music.
Yo, that MTV isn't very Stand Up Jack. It's more like, whack.
by John McKay April 7, 2004
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A term used when you eat so much mother fuckin better that you preform a persevere that involves ripping the butter sticks out of your asshole than deepthroughting them until you choke and die
Yo that fag just got jacked up on butter!
by Ppinme69 March 19, 2015
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