Fetus Knees

When someone (usually of the tall variety) stands up straight and their knees look like a fetus face. Also knows as 'Old Man Face Knees'.

Me: Hey Stratho, look at the tall chick. She has fetus knees. Weird.

Stratho: I like it.

by Mungo260 January 8, 2016

Knee-clapper

When a prism claps their knees when they walk.

James Horton is a knee-clapper when walking the halls of Cranston West

by MclovinDATa$$ May 30, 2018

mayo knees

Adjective, Noun - A middle aged mans knees that over time get filled with Mayonnaise and become weak, but gives the same man the feeling he is still young, and can play sports.

Yo Mo, did you see that old dudes Knee snap back balling, he thought his Mayo Knees would hold up.

by Whereshunter March 14, 2022

knee cleavage

knee boobs without nipples

my knee cleavage looked so hot in that nude

by chickenislyfe April 29, 2016

beans knees

Cleverly derived from the phrase “Bee’s Knees”, Beans Knees is a phrase used to describe a great coffee.

“Yo bro, this new coffee is seriously the Beans Knees!!!”

by Your Grayness May 18, 2021

BBQ Knees

Is it when you spread bbq sauce on the back of your knees and then moan “hooooooooo yahhhhhh”

Hey, we doing BBQ knees this weekend?

by PrinceYashua August 19, 2022

tuck knee

The "proper" way to do an indy grab in skateboarding.
involves tucking your back knee into the nestle of your front leg, and reaching your arm over your back leg to grab the board, as opposed to grabbing inbetween, which may result in a "stink bug" pose

you have to learn to frontside air proper! you never heard about the tuck knee?

by akatoast July 7, 2022