Knee Slapper

A saying a person does when another person says an unfunny joke but you're being sarcastic about it, indicating it was the funniest joke you have ever heard in your life. (being sarcastic if you didn't get that)

"Hey Billy, why did the chicken cross the road?... TO GET TO THE OTHER SIDE!" *laughs hysterically*

"What a knee slapper, Timmy!" *slaps knee*

by lovelyleftorgan777 May 4, 2022

soap slapper

A person which puts his penis in a soap bottle and masturbates by shoving it up and down.

I can imagine Jeffery being a soap slapper, what a freak!

by Heisenberg308 August 3, 2024

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

Slapper

A song that slaps

See also: banger

Damn this song is a slapper

by The Cat Edgar August 6, 2020

Slapper

When something is really good or funny.

Yo watching you fall off your bike was an absolute slapper.
Blaise coined the word slapper.

by AllHaleBlaise April 16, 2021

Slapper

Whore/Slag

You old slapper

by Slapper236 February 28, 2020

watermelon slappers

Big ass watermelon lips

Hey, you know my friend Hayden? Yeah, he was some watermelon slappers

by Slappers150 May 13, 2019