The anus of a fish which, given that fish spend all their lives in water, would have to provide a very tight seal. Metaphorically, the term is usually used in conjunction with the words "tighter than a" to indicate that someone could hardly be more frugal with his spending.
Tom: "I never leave a tip when I eat out- even if the service was excellent".
Jerry: "Man, you are tighter than a fish's asshole".
Jerry: "Man, you are tighter than a fish's asshole".
by poo hole December 21, 2012

A term to describe a certain type of hallucinatory experience, one in which a person has a sense of swimming through a clear, water-filled tube about the diameter of their own body and seeing fish swimming alongside them.
I was moving in super-slow motion in the fish pipe and I noticed that one of the outrageously colorful fish was staring back at me with such love that I began to sob uncontrollably.
by Dr Bunnygirl July 6, 2022

Sort of like self pitty, but more like the act of faking to hate oneself and expecting to get peoples sympathy.
Karl: I hate myself i am such a stupid person *thinks that he is smart for sympathy fishing*
Person:no your not you are awesome and smart.
Karl: *evil smile*
Person:no your not you are awesome and smart.
Karl: *evil smile*
by lukadude June 20, 2015

When titty fucking goes wrong...
The act of mashing ones flaccid dong and balls against a females breasts
The act of mashing ones flaccid dong and balls against a females breasts
In a last ditch attempt to thwart whiskey dick Bren made a brief attempt at slathering the fish before the poor girl ran out of the room crying
by Dolbarado April 12, 2013

Going around a neighborhood and stealing mail from mailboxes to sell someone's information online or to find credit cards, checks, gift cards, greeting cards with money, etc.
Mailbox Fishing is a federal offense that is punishable by imprisonment.
Mailbox Fishing is a federal offense that is punishable by imprisonment.
Someone was mailbox fishing in my neighborhood because I'm missing very important mail that I should have received last month.
by Legend1999 February 28, 2019

A fish "dildo" that a girl uses to masturbate with and enjoys the pain of being boned by the fish.
PlunderVaginaDildoFish
PlunderVaginaDildoFish
Jessica:"Hey, so I tried that punk fish out and it feels amazing"
Carly:"See I told you, and I use mine everyday!"
Carly:"See I told you, and I use mine everyday!"
by Venessa Jennings August 30, 2013

A Foisty Fish is a seedy sex trap, when someone lays waiting naked for you to return, but they aren't waiting in a sexy way, quite the opposite.
Slithering and sliming around the bed, in their own filth expecting sex - but the sight of it is an instant turn off.
Slithering and sliming around the bed, in their own filth expecting sex - but the sight of it is an instant turn off.
by Chocolate Wrists October 22, 2018
