Square Tire 

Motorcyclist that never gets off interstates or major state or Federal highways. Complains loudly to fellow bikers if any side trip is proposed or considered. Usually a novice biker that will end the hobby soon. Very unpleasant to ride with.

The pack finally realized that Kyle was a "square tire" and told him they would meet back up with him in the Davenport/Moline area

Square Tire by ponderpoint August 18, 2009

Square wave 

A wave that is square shaped.

Wanna go swim in the waves?
You mean do u want to go in the square waves.

Square wave by you are reading my name May 8, 2020

square banana 

a phrase meaning to hook up or get with somebody.

you have to square banana with some one timers before you start square bananaing with someone you want to be serious with.

square banana by miltapanmaniacs December 1, 2011

Square of Despair 

While in prison, you are unwillingly taking it up the ass, having one shoved in your mouth and giving hand jobs to guys on either side of you.

Hey man, you hear about Lil' Pete getting the Square of Despair in the showers?

Square of Despair by Darth Zilla the Bob October 16, 2019

Square Bulge

When the outline of your phone sticks out of your front pants pocket

Ryan got a double square bulge in his jeans when he had to hold on to his wife's phone for her.

Square Bulge by strikerg September 5, 2018

Square root club 

A term used to describe people in college that have GPAs that are so fucking low that if you took the square root of their GPA, it would be larger than their actual GPA.

Roommate 1:Jesse's a fucking dumbass, his GPA is .78.
Roommate 2: That puts him in the square root club alright.

Square root club by Sang-froid May 9, 2018

square brain 

when your always confused and you're kind of stupid

"I don't get this, I have square brain"

square brain by That Random BLANK April 22, 2020