Fish belly 

The underside of your erected penis.

I've noticed I have a nice looking fish belly.

Fish belly by Croy33 October 6, 2016

Fish belly 

when a chick with a gut has a short shirt on and it sticks out the bottom.

hey get a load of the fish belly on that whore

Fish belly by hate thy neighbor March 4, 2009

fish belly white 

In Caucasians, the color of the skin under a bathing suit or underwear waistband. Skin which hasn't seen direct sunlight recently (if ever).

When Grandma was in the hospital, I accidentally saw her fish belly white butt.

fish belly white by leroyd January 9, 2010

Belly Fish

A poop on deck, or having a turd in the chamber.

Excuse me kind sir, can you point me to the nearest restroom? I have a belly fish that I need to release into the wild.

Man I need a bathroom fast! I have a belly fish swimming to the end of the chanel.

Belly Fish by DB#4 April 18, 2009

better than a slap in the belly with a wet fish

better than it could be

Complainer: This movie/pizza/vacation sucks!

Responder: It's better than a slap in the belly with a wet fish!

better than a slap in the belly with a wet fish by mom743 December 4, 2010

fishbelly 

A bad name for a white/caucasion person

McGee was called a Fishbelly when he lived in a black neighborhood.

fishbelly by Christine Amazing April 15, 2006

fishbelly 

Synonymous with honky

Get the f*** outta my house, fishbelly, before I bust a cap in yo fool ass!

fishbelly by Captain Awesome April 3, 2005