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.
The underside of your erected penis.
I've noticed I have a nice looking 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
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.