mechanic hand 

Ramming your fingers into a girl's rectum, causing your fingers to look as if you are a mechanic.

I just got so much shit under my finger nails, I look like I have a mechanic hand.

mechanic hand by Thommy94 December 14, 2006

mechanic hands 

Hands with precise finger movements due to years of doing handy work, such as fixing cars

The guy I was with last night had mechanic hands, I couldn't stop squirting.

mechanic hands by Robots225 September 20, 2019

Mechanics Handwasher

Similar to a Handwasher, the art of double fisting in an orifice, moving the hands in an alternating motion to mimick hand washing. But particularly using swarfega as the soap lube of choice.

Finally got chance to try a Handwasher last night but I could only find some swarfega so it ended up a Mechanics Handwasher!

Mechanics Handwasher by Barney18680 April 30, 2026

Quantum Handjob Mechanics 

Also known as Quantum Handjob Theory, Quantum Handjob Mechanics is a branch of physics providing a mathematical description of the dual particle-like and wave-like behavior and interaction of the hand and penis.
Quantum Handjob Mechanics describes the time evolution of physical systems via a mathematical structure called the Cum Function. The Cum Function encapsulates the probability that an orgasm is to be reached in a given state at a given time.

Quantum Handjob Mechanics is closely intertwined with the Hymenberg Uncertainty Principle, which relates the fundamental principle that it is impossible to simultaneously measure the present proximity to an orgasm while "determining" the future momentum of a subsequent orgasm with an arbitrary degree of accuracy and certainty.

"Dude, I'm failing Naughty Physics."
"Why?"
"I just can't figure out these equations for Quantum Handjob Mechanics. I'm going to fail that test on three dimensional cum functions..."

Quantum Handjob Mechanics by Dzzo August 6, 2011