Top Definition
like you're totally annoyed at this one person, just because of the fact that they feel fly, or that they were totally macking "this one time..." and they're just not. they totally have no game and just really fail at stuff that they describe. they're usually not mackin' at all, so you need to see it to believe it, but they probably won't show you. so they're being a jamhacky.
One: Yo, bitch I was like totally all up on that shit!!

Two: What the hell does that mean?

One: GIRL I was mackin' tonight!

Two: Well you're a friggen jamhacky.
by CheeryCheeryGainGain March 21, 2010

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