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

by Daddyaddy1219 July 30, 2021

The 'Macca Slapper' is a unique technique which is hard to master. Founded by the great Macca Slapper himself, you must thrust your junk up and down creating a clapping effect from your nut sack and penis slapping against your skin. This technique is for men only.
My boyfriend can do the Macca Slapper, he is way better than yours!
My Macca Slapper sound makes the whole room vibrate.
My Macca Slapper sound makes the whole room vibrate.
by Yatü August 27, 2018

Bro, woke up with the worst slappers arm this morning after double fisting Chilli and Big Red Last night. It was a struggle just to brush my teeth.
by PokiePlaya March 10, 2016

A female who in an effort to encourage further vigorous copulation slaps her own genitals as if beating a war drum. Rhythm is usually comparable to the Christmas Carol “ The Little Drummer Boy” with encouraging words in place of the lyrics and vigourous slapping of the hand on the genitals in place of the “Parumpa pum pum” sections.
by Peto G June 11, 2011

A mans who gets around. A boochie is another term for a female’s lady bits. And he’s hittin several in just a short span of time
Frat boy 1: Yo Chad, Brady’s been such a boochie slapper during this frat party.
Frat boy 2: Bro I know, I already saw him with Emma, Anna, Sammy, Bridget, and Heather tonight
Frat boy: whoaaaa bro that’s brazy
Frat boy 2: Bro I know, I already saw him with Emma, Anna, Sammy, Bridget, and Heather tonight
Frat boy: whoaaaa bro that’s brazy
by flowerchildhunty15 May 10, 2019
