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1.
When a person projectile vomits; much like a volcanic eruption, drawing its name from Mount Vesuvius.
Dude after drinking a lot of beer: "Man, I hope I don't vesuviate"

Dude the next day: "Man, I vesuviated everywhere last night"

Other people talking about the dude: "Man, that was some epic vesuviation last night"
by burke-lane September 10, 2010