Fish belly

The underside of your erected penis.

I've noticed I have a nice looking 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

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.

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.

by DB#4 April 18, 2009