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*

knee-slapper by dont you just wish you knew July 13, 2009

kappa slapper 

another name for a townie bitch who thinks she looks hard by wearing tracksuits, starting fights, and shagging anyone with more than 50 pence in their pockets

damn, that kappa slapper is ugly!

kappa slapper by mofo69 November 11, 2004

slapping the captain 

masturbating
(i.e. turning japanese, chucking custard, choking the chicken, wringing the meat, sliding the salami, exploding the chode, etc....)

Jack slapped his captain because Jane wouldn't fuck him.

slapping the captain by LaxG March 17, 2004

Sack Slapper 

Poop that is so big, when it is on its way down it slaps your sack.

When your turd hits the back of your nut sack its like the two things guys pride them selves on most high five each other. Thats a sack slapper!

Sack Slapper by Handyandy12345 January 20, 2009

water slapper 

A swimmer

A kid in my class is a water slapper

water slapper by jgyhsref January 22, 2020

Slappin cats

The act in which two bootylicous women interlock their spread legs and grind their vaginas together to stimulate each other's clitoris to orgasm. Often done by lesbians.

Allie: Hey bri wanna come over and slap cats today?
Brianna: Sure I'll bring the lube.
*commences slappin cats*

Slappin cats by The catslapper August 25, 2011

Slappy Ending 

When a male ejaculates into his own hand, and slaps his partners face with the cum filled palm.

I bet when Christopher Walken is done banging Melissa McCarthy, he pulls out, finishes himself off, and gives her a good hard Slappy Ending

Slappy Ending by TheSlappening November 15, 2016