Suck may refer to:

• Suction, the creation of a partial vacuum, or region of low pressure
• Suck.com, a satire and editorial web site
• Oral sex, particularly fellatio
• River Suck, a river in Ireland
• "Suck", a song by Nine Inch Nails from the 1992 EP Broken
• "Suck", a song by Shriekback from their album Jam Science distributed by Arista
• "Sucks" (song), a song on the album Angst by KMFDM

See also

• Sucker (disambiguation)