Double Knee Slapper

A double knee slapper is when you hear something that is so funny that it brings out your embarrassing loud obnoxious laugh. So instead you fake laugh out loud and jump in the air, slapping both your knees going “Boop boop” then land on your feet, yelling “Thats a Double Knee Slapper!”
Dude, Dom’s Double Knee Slapper yesterday reacting to her joke, nearly made me piss myself.
by DomTheItalian November 26, 2017
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Mega Slapper

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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Sand slapper

A hand job but instead of lube they person uses sand and spit
My girl gave me a sand slapper on Daytona beach at night and I got a yeast infection but it was great
by The mans dictionary June 24, 2023
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Tank slapper

A sudden oversteer in a car caused by the rear-end being unsettled in a corner. Usually happens if the accelerator is pressed too hard or too early on corner exit. May be unpredictable and needs delicate steering and pedal work to correct depending on severity

Term is originally used in motorcycling, but is used interchangeably with cars and racing
Tarquini had a massive tank slapper on Copse corner and lost quite a lot of time before Maggotts and Becketts
by NaggerNick October 11, 2022
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Tank slapper

Tankslapper is when a car has sudden oversteer due to many different conditions depending on suspension or drivetrain setup.

One possible origin for the word is old WW2 tank crew vetetans taking careers as racing drivers during 1950s and dubbing the natural effect of inertia as a "tankslapper" as the weight of a tank usually centered around the rear due to storing ammunition.
"A nice save from Senna from a massive tank slapper at the European grand prix!"
by NaggerNick October 01, 2022
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Knee-Slapper

/nē/ /slapper/

Noun

1. A joke; typically a pun or otherwise regarded “Dad-Joke”, the humour of which prompts an audible slap-of-the-knee from one or more of the parties involved.
Ron: “So me and the wife were down in Mexico last month, and she twisted her ankle at Salsa Night”.

Gord: “Oh no, what did you do?”

Ron: “I called ‘Nine-Juan-Juan’”.

*Audible laughter and slapping-of-the-knee*

Gord: “Jesus Murphy, Ron, you really had me going there for a second. Now that’s a Knee-Slapper”.
by be4nz1111 August 20, 2023
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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 05, 2022
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