1 definition by Fabian G

The original definition is:
"The gravitational sphere of a black hole within which even light cannot escape"
-Wikipedia

However, recently, a new definition has risen meaning something completely different:
The Event Horizion is the point at which a person is too drunk or stoned to be able to function properly, yet alone remember anything the next day.
Example:

Dude 1: *takes-drag-from-J*
Dude 2: "Oh shit, you don't look so well..."
Dude 1: *falls-off-chair,-blissfully-passes-out*
Dude 2: "Damn that lucky bastard, he just passed the Event Horizon!"
by Fabian G December 23, 2008
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