Top definition
The act of reaching a conspicuously high sexual state as a direct result of a fictional and unlikely sexual tale, created by oneself, for the sole purpose of gaining and maintaining a boner whilst performing daily tasks, such as work, shopping or driving.
Oh my God mate, i caused myself such an arrousion talking to myself about Jess today.
Mate, is that a screw driver in your pocket, or are you in arrousion right now?
by scooteration abomination July 05, 2010
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