Top Definition
A process normally seen in instant messaging clients, where one person makes a fake user id, and subsequently winds up other users; most commonly users on their own buddy list
Peter: This girl said she'd fuck me

Harry: Ha! That was a bam up!

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Tom: Here, by the way, I am pure heavy bamming this guy up.
by Iwouldliketoextendtoyou September 17, 2008
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