by I, Wreckerrr October 13, 2016
 Get the Knee Slapper slongmug.
Get the Knee Slapper slongmug. From (Or inspired from) The Tom Green song "Pet names for Genitalia"
A penis.
Because it slaps your knees, if you're horribly unproportioned.
A penis.
Because it slaps your knees, if you're horribly unproportioned.
by Springloaded June 6, 2004
 Get the knee slappermug.
Get the knee slappermug. 1) An otherwise unfunny, awkward, or just stupid joke. Usually a dad pun or something of the sort. Said after this to show that it should have never been said in the first place. Invented by hillbillies and rednecks when sitting on their porches, slapping their knees when somthing funny happens.
2)said after something funny and stupid happens.
2)said after something funny and stupid happens.
1)
dumb guy:"Two peanuts are walking down the street, and one of them was assaulted!"
normal guy (slaps knee and fake-laughs):"Wow! That sure was a knee slapper!"
2)
guy skates and falls off rail, hurting his knee and friend laughs.
Later they are talking and laughing about a dumb joke.
friend:"wow that sure was a knee slapper!" (slaps knee)
skating
guy:"yea!"(slaps knee very hard, and dislocates it from the earlier accident)
friend:"no that's a knee slapper!"
dumb guy:"Two peanuts are walking down the street, and one of them was assaulted!"
normal guy (slaps knee and fake-laughs):"Wow! That sure was a knee slapper!"
2)
guy skates and falls off rail, hurting his knee and friend laughs.
Later they are talking and laughing about a dumb joke.
friend:"wow that sure was a knee slapper!" (slaps knee)
skating
guy:"yea!"(slaps knee very hard, and dislocates it from the earlier accident)
friend:"no that's a knee slapper!"
by dhawk123 March 8, 2009
 Get the Knee Slappermug.
Get the Knee Slappermug. 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!”
by DomTheItalian November 26, 2017
 Get the Double Knee Slappermug.
Get the Double Knee Slappermug. 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*
"What a knee slapper, Timmy!" *slaps knee*
by lovelyleftorgan777 May 4, 2022
 Get the Knee Slappermug.
Get the Knee Slappermug. /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.
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”.
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
 Get the Knee-Slappermug.
Get the Knee-Slappermug. by Unifart April 2, 2021
 Get the Knee-slappermug.
Get the Knee-slappermug.