jack it up

Briefly and rapidly masturbating a quasi-erect penis (or "semi") after foreplay leading to partner sex. In this usage the goal is not to masturbate to orgasm, but merely to get the penis stiff enough to penetrate vagina or anus under the assumption that the erection will stay sufficient throughout intercourse aka fucking, presumably leading to a successful climax (orgasm).

"I had to jack it up a little before I could go in, but I was afraid she'd think it was kind of gay, or that I didn't love her."

"Naw, man, you do what you gotta do. Go ahead and get it up a little more. If Dorothy has a problem with that, then why doesn't she use HER hand?"

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jack it up

jack off

i might need to jack it up later

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jack you up

It means that you are fucked, screwed, gonna die. Too bad for you.

I will jack you up 'til you bleed to death.

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Jack-u-up

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!

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jacking jill up the hill

mutual masturbation between a male and a female

"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"

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jack ups

Excessively short trousers resulting in the exposure of ankles, and in extreme cases, calves.

haha, look at them jack ups

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jacked up

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.

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