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1) When someone is so excited or happy about something that they feel a tingle in their anus.

2) When someone is either so excited about something or so happy about something that it can be closely compared to the same excitement when a woman-loving man sees the perfect ass.
Dude, I don't know why you're talking shit about this awesome game when just last week you were going butt crazy over it.
by Mariceo Cullinato February 27, 2011
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