Piss  coarse slang —v. 1 urinate. 2 discharge (blood etc.) With urine. 3 (as pissed adj.) Drunk. —n. 1 urine. 2 act of urinating.  piss about fool or mess about. Piss down rain heavily. Piss off 1 go away. 2 (often as pissed off adj.) Annoy; depress. Piss on (a person or thing) show utter contempt for. Take the piss (often foll. By out of) mock; make fun of. [french, imitative]