When you have your erected penis out and a group of people repeatedly slap it all at once until they either get tired or when it falls off, and by it i mean your peanits.

"Dude, I got a bunch of people to give me a Mega Slapper at the party last night!"

by The Gooning Giant June 10, 2024

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downward slapper

A woman's booty that is so big that if you were to vertically slap the booty at a 90 degree downward angle, three of your fingers and 75 percent of your palm would connect with ass

Damn Mike, you see that downward slapper over there?! I bet she could make that shit clap for days!

Hey bro, Mike started seeing a new girl, but she don't got a downward slapper. That shit ain't cool.

by xo805 December 11, 2020

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calf slapper

A very long penis that dangles below the knees and slaps the calves when running. May also be used in the plural form to describe low-hanging testicles. See calf slappers

As I ran beside Brad during our workout today, I heard a pitter-patter below his knees. He must have a real calf slapper in those sweatpants!

by CalfSlapper October 26, 2015

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