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Usually occurs the morning after heavy drinking and can be accompanied with actual barfing. Involves regular trips to the toilet with little or no warning.
Guy 1: Hey dude, awesome night last night but you were wasted!
Guy 2: Yeah, it got pretty crazy!
Guy 1: How you feeling today? Pretty hung, I guess?
Guy 2: Oh yeah, been having a serious bum barfing session all day.

Guy 1: I hate when that happens!
by Joneman January 04, 2010
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