Excessively short trousers resulting in the exposure of ankles, and in extreme cases, calves.
haha, look at them jack ups
by potusss January 23, 2007
This is a phrase largely equivilent to fucked up or screwed up. It roughly means "in a state of disarray" and is commonly used in the phrase "to jack someone/something up". In some cases, the meaning may be slightly altered by the fact that to get "jacked" can mean to be struck or injured.
That's jacked up man. I can't belive your girlfriend is cheating on you.

I got in a wreck last night. My car got totally jacked up.
by pete August 12, 2004
Derogative term for trousers worn too short (approx 1-3 inches above the shoe), often with white socks underneath making the jack-up more obvious.
Check that guy's jack-ups
My best trousers had shrunk, resulting in fairly serious jack-ups
by Nicky November 29, 2004
In the military, to be given a stern talking-to by an NCO for some offense or omission.
"We all got jacked up this morning for calling him 'sergeant-major' instead of RSM."
"On course they'll jack you up if you aren't wearing dress uniform in your ID photo."
by HellHound May 5, 2015
1. not working properly or as intended.
2. having used a large quantity of speed, cocaine, or other amphetamine.
3. cut or lacerated by means of a make-shift knife or blade. see SKIV
4. In generally poor or injured condition.
sense "1": "This is so JACKED UP! She said she'd be here at eight!"
sense "4": "I want to play, but my shoulder's still JACKED UP from last weekend.
by mainframe November 1, 2003
1. Incrase sharply

2. Inject illegal drugs

3. Raise a car to be able to do mechanical work
1. Jack up the oil prices

2. Jack up heroin four times a day

3. Jack up the car and change the tyre
by osmokozmo October 26, 2007
1.) To be in a state of disarray, or an undesired position.
I wrecked my truck last night, and the front-end is all jacked-up.
by Gary J. Talley March 19, 2003