knee-slapper

when someone slapps their knees because somethings really funny.

eg. danas brother sings and dances to 'its raining men' KNEE-SLAPPER

eg. claudias hair is ranga *slaps knee*

by dont you just wish you knew July 13, 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.

by KROGO July 6, 2005

knee slapper

Sarcastically used to point out an unfunny joke. It originates from the act of slapping one's knee during vigorous laughter. Later took on a sarcastic meaning.

Comedian: I just flew in from Los Angeles, and boy are my arms tired!

Audience member in sarcastic tone: wow that's a real knee-slapper

by Joe February 11, 2003

Knee Slapnea

The most invigorating form of exhaustion known to clothed humans. In this condition breathing is interrupted for 15-30 seconds when laughing uncontrollably. Untreated, it may lead to spontaneous flatulence and staining of undergarments.

I feel terrible, I told Bob a joke and he fell down, rolling around in a fit of Knee Slapnea, am I responsible for any injury?

by phidgety September 12, 2016

knee-slapper

A funny story or event. Generally used facetiously. If not used facetiously, the user is a dork.

AHAHAHAHA, that's a KNEE-SLAPPER!

by emelizabeth October 30, 2004

knee slapper

something that is stupid and funny at the same time

Guy 1: So a guy walks into a bar...OUCH!
Guy 2: ROFL THAT'S A KNEE SLAPPER! *slaps knee*
Random Guy: Oh yeah? How bout a face slapper! *slaps Guy 1 and 2's face*

by Skullex May 18, 2008

the knee slappers

A group of nine friends who make weird jokes and react to them by saying "that's a knee slapper, har de har har" and slapping their knees.

Knee slapper #1"And then the whale said, wait whales can't talk!" the Knee slappers "That's a knee slapper, har de har har!"

by A knee slapper April 6, 2013