1. Offensive slang for "hey you" for people who want to act like snakes.
2. A pissing sound.
3. A sound used to call attention to someone in quiet cirumstances for a pseudo-slick impression.
4. A trick. The psst sound is draw, they come to wisper something in your ear while another kid sets up on all 4s behind your legs, then you're on your ass. Usually followed by a, "hahahaha, idiot." and sometimes a gunshot.
Dude! Quite peeing on my desk!
Used mostly in quiet circumstances to obtain the attention of another person. Occasionally used in a loud, sarcastic tone in a situation that obviously doesn't require silence.
Psst. Hey you. (quiet)
PSSSSST. HEY. YOU. (unquiet)
Please say something, thanks.
Let's make something happen tonight.
Okay. I'll be over there in a few minutes.