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.
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.
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)