Top Definition
A trio of songs by Matthew Bellamy of Muse. A symphony so intense and beautiful it makes you cry.
Exogenesis gave me a mental orgasm.
by LeRickRoll September 28, 2009
the state of simultaneously entering and leaving (essentially "coming and going")
Joey's incessant exogenesis was driving all the sea monkeys into a frenzy; they never knew if they'd be fed again!
by Pluto Krozabeeep November 11, 2002

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