mississippi potato slapper 

When you put your hand down your pants and rub under your genitals then slap someone in the face

When i was at my girlfriends house i gave her a mississippi potato slapper

mississippi potato slapper by fist pumping god January 21, 2010

Double fisted thigh slapper 

A penis so large it involves having to use two hands to hold it/masturbate that also slaps the thigh while naked.

Also called a DFTS.

Damn dog, women must run when you bust out that double fisted thigh slapper you keep hidden away.

Jeff walks funny due to his double fisted thigh slapper hanging low.

Double fisted thigh slapper by DoubleFistedThighSlapper January 29, 2019

Grease Slapper 

Pizza. Generally a thin crust pizza with multiple layers of cheese and puddles of grease randomly found across the pizza.

Ryan was famished when he got done planting corn and making sausage and had a strong desire for one of Sarah's famous grease slappers, but first he had to clean the pig excrement from his shoes.

Grease Slapper by mikeverdill June 10, 2009

knee-slapper

a joke that is so silly that in order to handle it you must slap your knee

Rick told me the best knee-slapper yesterday.

knee-slapper by KROGO July 6, 2005

Rat slapper 

Someone that uses or creates surreal/cursed memes to an extent that it becomes part of thier character as a whole.

Person 1: that guy over there likes those weird internet jokes way to much
Person 2: Ikr, he's such a rat slapper

Rat slapper by M&M the raper October 10, 2020

Wicked Slapper 

An incredibly large dong. Often causes minor vaginal trauma and intense orgasm.

Jim pounded me with his wicked slapper last night.

Wicked Slapper by Feathers McGraw May 25, 2010

Leg slapper 

Like a knee slapper, but when you're mad the joke isn't funny.

Burt: Why did the chicken cross the road?
Haley: IDK WhY?
Burt: To get to the other side.
Haley: (Screams and slaps leg really hard) That's a leg slapper!

Leg slapper by MultiAwesomeGirl123 April 24, 2010