Cock ass clenches 

Put a 10kg bumble on cock and clench asshole to get a more defined dick.

I just did some cock ass clenches

Cock ass clenches by Ahh daddy 9000 September 20, 2021

Butt Clencher 

A suspenseful situation, typically referring to a TV show, movie, or book.

The season finale of The Walking Dead was a major Butt Clencher!

Butt Clencher by madambluhhh April 13, 2015

Fist clencher 

An emotionally charged rock song that causes you to drop to one knee, bend your elbow and curl your hand up in to a fist. Often accompanied by air guitar, open mouth dancing and big hair.

That Bonnie Tyler song really rocks.

Yeah, it's a real fist clencher.

Fist clencher by Thedukethe July 21, 2010

clencher 

A windy or curvy road that may make vehicle passengers nervous, often used in the Pacific Northwest.

I got carsick after my friend drove too fast on the clencher.

clencher by mountainman2 January 17, 2021

butthole clencher

Anything that causes enough excitement to tighten one's butthole. Can be thrilling or scary.

Man, this horror game is a real butthole clencher.

butthole clencher by Amy_S April 1, 2017

Thigh Clencher 

The move a female makes when horny in an attempt to quell her loins

Gina sent Tori a really hot nude, it was one hell of a thigh clencher.

Thigh Clencher by Beryllium July 10, 2015

goolie-clencher 

(Or, "ball clencher", "cheek clencher", or just "clencher" for short)

A bad or painful result. Similar to having one's goolies put in a vice. Can also mean a bad or painful result for someone else.

Glen: What's up dude?
Sandeep: My God. I followed our analyst recommendation and bought Enron bonds. They've just filed for Chapter 11 and there's no bid for the shit. I've just lost $35,000,000.
Glen: Wow, that is a Class A goolie-clencher. Think you'd better find a headhunter.

Mark: How did the Quantum Mechanics exam go?
John: Terrible. Question 2, you had to derive the magnetic moment of the electron from scratch!
Mark: WHAT? What a ball-clencher! That takes hours!

Duncan: Was that snotty kid we saw last year bowling his shite?
Josh: Yeah, first two balls I smacked him for six, and then the next one I drove it back over his head for four missing his head by about 2 inches ...
Duncan: Clench!

goolie-clencher by mp666 March 4, 2010