a simple code to express extreme displeasure with someone. Alphabetic code numbered 1 to 26. In this case the illustrious F-U.
6-21 former coach of the red and gold California football team.
Hey, criminal elected leader of the free world, 6-21!
Hey, criminal elected leader of the free world, 6-21!
by Imtalkinhere December 18, 2014

When someone is being a cunt you can tell them 6-21. This is only to be used in a public setting where you can’t directly curse them out, and it stands for F-U, or (fuck you).
by Ya boi Chris May 19, 2019

by bedsbee June 21, 2021

by guy who likes to go camping June 23, 2022

National Smoke Day. (Also known as the the Great American Smoke Out)
6/21 is the day you smoke all the Ganj you have.
6/21 is the day you smoke all the Ganj you have.
by Jae June 21, 2004

by Vagabro February 16, 2018

by thedevilher December 08, 2021
