quadrafin 

noun: $20 bill; the equivalent of 4 fins.

I slipped her a quadrafin for the rusty trombone and was on my way.

quadrafin by jeehosephat October 24, 2005

quasi quadratic 

The Schrödinger's Cat of equations. Nobody really knows what it is or what it means. The easiest way to commit an algebraic atrocity.

What the hell is a quasi quadratic?

quasi quadratic by It'sMillerTime October 23, 2018

Quadringenarious Nut 

A nut that was busted so hard it literally got sent to another fucking universe.

*Someone busts a Quadringenarious Nut*
*🅱ass 🅱oosted Wolves plays*

Quadringenarious Nut by OoftheDoof! October 14, 2019

Quadrafong

Historically in the context of the Americas, a quadrafong or quarterfong was a person with one quarter asian and three quarters European ancestry. Similar classifications were octofong for one-eighth asian and hexafong for one-sixteenth asian. Most likely considered to be an offensive term.

Eric's grandparents and father are American but his mom is from China, therefore he is a quadrafong.

Quadrafong by William Chastain March 3, 2019

quadracial 

A person who is mixed with four racial backgrounds, usually both parents are bi racial.

Billy's mother is half Chinese and half German.

Billy's father is half Jamaican and half Egyptian.

Billy is 1/4 Chinese, 1/4 German, 1/4 Egyptian and 1/4 Jamaican. This makes Billy quadracial.

quadracial by Funkygal June 24, 2016

quadringentillion 

One with 1,203 zeroes after it. Higher than a trecentillion which is one with 903 zeroes after it.

I have about a quadringentillion funny friend points.

quadringentillion by DiamondTroller January 26, 2015

Quadragon 

The Pentagon, but with one less side ("quadr-" replacing "pent-"). Penned by The Onion in a censored joke following the September 11, 2001 attacks.

The Onion: "America Stronger Than Ever, Say Quadragon Officials"

Quadragon by To All Things August 18, 2017