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per square inch

sometimes used in paintball
when using or playing paintball and HPA *high pressure air* their could be 850 psi in a pb tank
PSI by viva la vidaa May 6, 2009
Related Words
The letter in the Greek Alphabet that comes after chi and before omega.
alpha, beta, gamma, delta, epsilon, zeta, eta, theta, iota, kappa, lambda, mu, nu, xi, omicron, pi, row, sigma, tau, upsilon, phi, chi, psi, omega
PSI by The Cobbgoblin May 23, 2006
1. Yo I can't beat this level, the RNG is too crazy
2. Nah man I beat it first try, sounds like your problem is just PSI
PSI by Malixo January 22, 2021
Pounds per square inch.

If used in the form "That person has a high PSI". It is a sexual reference saying there ass or another part of the body where a penis can be inserted is capable of taking alot of pressure, or quite a hard pounding. Can also reference to the largest penis they can fit in their ass before the pressure gets to high and rips it.
That h0 has a really high max psi.
PSI by Anonymous February 24, 2003
PSI: A black and white Siberian Husky with one brown eye and one blue eye. The most extravagant Siberian Husky in the United States. He's very loyal, protective, and very athletic. The best friend you will ever have.

Knows his surroundings, capable of saluting, shaking your hand, giving you a high five and knows how to speak.
Psi is the most gifted Siberian Husky a man could ever ask for.
Psi by PsiChase October 6, 2019
Hey can you PSI me
(after you constantly messaging someone and if they keep ghosting you, you can type PSI to tell them to stop ignoring you this will make them feel guilty and talk to you)
PSI by ThyImmortalSoul January 26, 2021