Jacking up 

To have a lot of something whether it be materially or people and wanting some more of that

I be jacking up with the ladies

Jacking up by Christia January 31, 2004

Jacking up 

'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.

Jacking up by MC BeeStealer September 19, 2016

Jacking Up 

Watching '24'.

"Where's Toby?"

"He's not coming out; he's too busy jacking up. That's 19 hours straight, man. I think he's got a problem.."

Jacking Up by Chandra42 October 21, 2008

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"

jacking jill up the hill by Naruchico January 2, 2009