Piss definition, urine. See more. WORD ORIGIN pisistratus, pismire, pismo clam, pisolite, pisolith, piss, piss about, piss artist, piss away, piss off, piss-poor.
piss (v.) late 13c., from Old French pissier "urinate" (12c.), from Vulgar Latin * pissiare, of imitative origin. To piss away (money, etc.) is from Related: Pissed.
Piss definition is - urinate. How to use usually vulgar: to urinate in or on. piss. noun. Definition of piss (Entry 2 of 2) See more words from the same century.