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1.
The sound of a booty jumping on Lil' Wayne's lap, comparable to the sound a large truck makes when it goes into reverse.

Also, the sound of intercourse.
"I'll make that ass jump like schzurp schzurp"

"Dude, I heard you and your booty call last night. All I heard was schzurp schzurp and I couldn't sleep. Keep the schzurp down next time."
by Instereotegrilatorialator March 16, 2010