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1.
When you drink so much beer, you start to foam out your ass.

It is also known to be when you throw up and take a shit about the same time.

I think Logan has had enough beer for the night because I just caught him assfoamin' in the restroom.
by Beertakercas March 31, 2009

Words related to Assfoamin'

ass beer foam fucked-up shit throw-up