Top Definition
The detrimental effect you encounter where you're stream of urine goes in at least 2, if not more, different directions while taking a piss after masturbation.
John: Damn dude afterbatin' got me again, I just pissed all over the towels by my toilet.
Fred: Ah you gotta watch that afterbatin' it'll get ya every time.
by DaBoot July 15, 2009

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