Unlike what Chandra believes, this term refers to muscular people.
That guy is jacked up! He must work out 24/7!
by daboss43 March 26, 2012
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The state of an automobile when changing one's own tire, probably on the side of the road with a jack.
I changed my flat tire once my Mustang was jacked up and the wheel was off the ground.
by Rev. Sully May 25, 2007
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To jack-up is a gymrat term for working to improve a specific muscel or set of muscels, especially women who want to firm-up their butts.
She is doin something to jack-up that ass. I'll bet she spends an hour-a-day on the stairclimber."
by Jim Inman August 17, 2006
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A “Jacked Up” is a 4x4 vehicle usually a pick up truck modified for off roading
I’ll take my jacked up and drop her down in 4x4
by Mumbl3s8p August 4, 2019
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Danielle: "Did you here that Allie got jacked up at the party last night?!"

Eliana: "OMG!!! What a slut!"
by dickonfire July 29, 2016
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To have a lot of something whether it be materially or people and wanting some more of that
by Christia February 1, 2004
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'Jacking up' is the state in which a person/hobo/fugitive finds himself somehow getting involved with injecting heroin, a really bad drug, also a really stupid way of ingesting a drug. 'Jacking up' is sometimes referred to as 'stabbin' da veins'
Jalentine posted a photo of himself 'jacking up' which means he is a real badboy and he also got a tattoo and now he is fell over because he did too much heroin.
by MC BeeStealer February 12, 2016
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