the act of stuffing a nice piece of pizza in your partners poone and packing it nice and tight with a pounding motion with your penis
Matt:i gave that cunt danielle a pizza slopper....shes still trying to get it out
Jake:good work
Danielle:ive been smelling like pizza for like 2 weeks now wtf i hate that bitch
Alex:im hard
by Matt chokes on dick February 21, 2008
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An undertime slopper is the act of smearing feces on one's own testicles and then using said feces to masturbate furiously.
I heard that some people enjoy undertime sloppers; I might have to try it one day.
by DaylightEnjoyer27 December 17, 2022
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The act of consuming dirt from a typically questionable source.
by Allan Wagner May 20, 2023
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I Love Undertime Slopper!
Person: "I Love Undertime Slopper!"

Other Person: "Same!"
by 544PDE Gaming April 5, 2023
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Carl: "Yo Stewie, how was your date with Andessa?"
Stewie: "You wont believe me, she gave me the best Underline Slopper ever"
by Seacole June 22, 2023
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