Piss is a vulgarism. Piss(es) or pissing may refer to:
- Urine, a liquid by-product of the body that is secreted by the kidneys and excreted through the urethra
- Urination, the ejection of urine to the outside of the body
- Piss (album), a 1993 album by Slank
- "Piss", a song by Doja Cat from the album Scarlet 2 Claude, 2024
- "Piss", a song by Pantera from the album Vulgar Display of Power
- "Piss", a song by Ministry from the album Animositisomina
- "Piss", a song by Neil Cicierega from the album Mouth Silence
- Piss (Černý), a 2004 sculpture by David Černý
- Pin Index Safety System (PISS), a type of safety system