What is Jack-up?
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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."
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Random Words:
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1. When one nigga pulls out his nine and f's another nigga up in the grill. This is generally caused by a nigga acting stupid.
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narscisistic and insecure luser of MySpace who spamsothers with friend requests seeking like-minded people who add each other and post i..
