not so much a word as an action. when someone is talking to you and you dont really want to hear what they have to say or you just dont feel like listening you just go pssssss... and eventually they will get the point and shut up.
hillary: hey for once in your life could you pick up your damn clothes around here.
to go to the toilet before somewhere else or to take a detour via the toilet on your way to somewhere else. Usually done before drinking to avoid "Breaking the seal" too early.