To orgasm due to the witnessing of something of extreme epic proportions.
Ex. 1) Person One: This game is fucking sweet!
Person Two: I know, I think I just had an epicgasm.

Ex. 2) Stupid Person: Omigad, The Happening waz such a good movie, don't u think??? It made me epicgasm lolol
Me: ...You're a fucking idiot.
by baileyFTW October 28, 2008
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