Chap Slap 

When a male moves rapidly i.e. jogs, runs, or gallops at a fast rate and their testicles and/or penis hits their inner thigh area (unilaterally or bilaterally, depending on which way you lean and how fast you're moving) creating a 'SLAP' noise that can be heard by others.

Cause:
Commonly by not wearing any supporting undergarments (i.e. underpants) which allows the gonads to move free-flowingly.

Action:
Wear underpants or some other type of supporting undergarment (stupid)

WARNING!! Can be painful!

N.B. Through recent study it has been noted that women can also suffer from a female equivalent of 'chap slap'.
However, more studies have to be conducted in order to confirm the origins of the 'SLAP' noise.
Scientists are unsure whether it originates from the genitals, buttocks thighs or overtly large and gravitationally affected mammary tissue(s).

Biologically female candidates will be required for a forthcoming study - Sadly, due to poor sponsorship, candidates will not be rewarded for their efforts.

Yeah Nan. I know. I ran up the stairs the other day to go get my wanky blanky and i got chap slap. It was well loud!! Bloody hurt as well!!

Chap Slap by Neville Smythe-Boyd Anderson Chapworth March 26, 2005

Chap slap 

When a male gets slapped in the gonads by another male and the latter shouts "CHAP SLAP!"

"Chap slap!" keiran exclaimed as he whacked aden in the gonads

Chap slap by Richard Bronze-Balls Johnson December 21, 2014

Navajo Chap-slap 

The Navajo Chap-Slap is a sex position that has the receiving partner kneeling on the bed. The other partner who is giving it then proceeds to wrap one leg around the back of their partner's neck and the other leg wrapped around the back of left or right (depending on which leg is on the neck) knee and then proceeds to insert the penis(or Strap-on) and then bends the partner over them and plays the Ass-Bongos.

I'm going to Navajo Chap-slap the shit out of her. She Puts the Chap in the Navajo Chap-Slap.

Navajo Chap-slap by Papa Jango December 27, 2016

One slap chap 

Similar to a one pump chump but ejaculates at the thought of intercoarse or physical contact. Can’t even make it past the first date long enough to get any action because he has soiled himself almost immediately at the sight of a woman. Often referred to as a one poke bloke.

Yo look at that poor lad.. can’t even get a girl to date him.

He’s a one slap chap

One slap chap by Foxyfivefaceyouknowtheone February 23, 2021