Top Definition
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
by Christia January 31, 2004
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.."
by Chandra42 September 03, 2008
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