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when someone is so intoxicated or high on drugs that they don't know what they are doing, and consequently do something stupid or extremely illegal.
Gorge:Jamal where did you get all of this stolen shit?!?!
Jamal:I don't even know dog... I was on a bad one last night.

Tony:Dude did you really fuck that ugly ass girl?
Jack:Probably I was on such a bad one though...
by BIGMOKE December 02, 2007
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