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Something that happens randomly; spur of the moment; unplanned.
Jack: hey Jill, remember that time we went camping?

Jill: yeah, what about it?

Jack: well, when I was walking up that hill... Oh crap, I just remembered the time we had anal sex and saw feces on the tip of my penis!

Jill: Woah, talk about randomousity at its finest!
by The King of Vihars June 17, 2006
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