(Pygocentrus Nippleri) The Pink Bellied Piranha, a.k.a. the Nipple Fish, is native to the Amazon River and remote regions of the southern tip of the continent of South America as well as Southern Central America.

The Nipple Fish is known as the nipple fish for two reasons, namely for attacking and latching onto the nipples of nearby mammals that enter the water and for the pink "nipple-esque" color of their underbellies.
"Those Nipple Fish are some nasty little fuckers. They'll latch on and wont let go unless you kill them."

"Tom was drowned by a group of Nipple Fish. Be careful, if you see a piranha, you better hope its a red bellied piranha. They'll just kill you.
Pink bellies- now they'll take you down slow. Starting with the nipples."
by phileeope January 2, 2014
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nipple fish are fish that attack nipples.
"Ouch! These nipple fish are fierce in the Carribbean!"
by MLN February 10, 2012
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a man with a tiny black penis puts his penis on another persons nipples, pretending it is a fish on his lunch brake.
hey Jim, Cherry and I roleplayed last night. I was the legendary chocolate nipple fish and she was a naughty school girl.
by abusivecereal45 August 14, 2010
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A rural manner of suggesting the rarity of something by using a nonexistent figment of the imagination to do so.
45’s ability to make good decisions is about as commonplace as a fish nipple.
by Dr Bunnygirl August 26, 2019
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