kneetumps 

The classic art and musical instruments, used as symbols, for the knees.

“Look! Cindy’s using her kneetumps! They sound so good!”

kneetumps by Suckmykneetumbs90210 January 14, 2018

kneecumpoop

What ends up on the knee (cum & poop) after a hot solo session on the toilet, and then accidentally falling knee first into it while wiping.

"I kneecumpooped earlier now my pants are brown, crusty, and ripe!"

kneecumpoop by KAmoneySSS December 11, 2024

Austrian Kneebump

A masochistic act of selfinflicted pain.
Have an injured calf muscle and then walk knee first into a table, bending your knee too far and feeling the pain.

"Oh yeah, i just did the Austrian Kneebump, gimme more, Mistress"

Austrian Kneebump by wildcard.institute August 19, 2022