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Common abbrevation for Psionic Energy,
it can also be used as the name of a catagory of skills, often called Psionics.
When you make a PsiBall, you can feel the Psi running through your body.

How long have you been doing Psi?
by PsiZero November 06, 2003
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Feb 23 Word of the Day
The process of searching a building for an empty bathroom. A successful bowl search typically relieves the frustration of uncomftorably defecating around others, although in less frequent cases the desire to urinate alone is a factor. Bowl searching can be done anywhere although it is most prevelant on college campuses.
"In college I did a lot of bowl searching."

"Sam went to the bathroom like 20 minutes ago. Jeez, what's taking so long?"

"He's probably bowl searching."
by A bowl searcher June 06, 2011
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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
by viva la vidaa May 06, 2009
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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.
by PsiChase October 06, 2019
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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
by The Cobbgoblin May 16, 2006
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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.
by Anonymous February 24, 2003
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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
by Malixo January 22, 2021
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