Top Definition
Excessively short trousers resulting in the exposure of ankles, and in extreme cases, calves.
haha, look at them jack ups
بواسطة potusss يناير/كانون الثّاني 23, 2007

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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
بواسطة Nicky نوفمبر/تشرين الثّاني 28, 2004

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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
بواسطة osmokozmo أكتوبر/تشرين الأوّل 26, 2007

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commonly thought of as meaning trousers that are too short, 'jack-ups' are actually trousers that, surprise surprise, have been 'jacked' up. That means that the waistband has been pulled higher than necessary, possibly up to the naval (bellybutton) or chest.
person1: (indicating person2's trousers) ha, look, he's got jack-ups!

person2: actually, my trousers are just a bit short

person1's friend, person3: yeah thats what jack-ups are, you idiot

person2: commonly thought of as meaning trousers that are too short, 'jack-ups' are actually trousers that, surprise surprise, have been 'jacked' up. That means that the waistband has been pulled higher than necessary, possibly up to the naval (bellybutton) or chest.

person1 & person3: youre such a nerd
بواسطة A D أغسطس/آب 13, 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."
بواسطة Jim Inman أغسطس/آب 17, 2006

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