Bellyhurt 

Cramps and or stomach pain due to eating or drinking something which causes such pain

Those beans gave me really bad bellyhurt.

Bellyhurt by Menace246 November 4, 2008

Bellybuttugly 

A woman with a large belly and or butt wearing an unsightly bikini or thong.

Lady, wear a cover up, that swimsuit is bellybuttugly!

Bellybuttugly by Benvenuti March 10, 2019

Mr. Bellybutton 

Mr, Bellybutton is someone that you will hate or be friends with. Mr. Bellybutton is overweight and walks around with his bellybutton hanging out.

Did you see Mr. Bellybutton's stomach?!?! IT WAS HUGE!!!

Mr. Bellybutton by ⒾⓐⓜⓈⓄⓊⓅ December 3, 2018

Bellyhug 

Such a close hug that there is almost total belly contact. Takes place most likely in bed, with your significant other.

Can't we just lay on bed and bellyhug for an indefinite amount of time, Teun?

Yes, Mila. I'd very much like to.

Bellyhug by cookiefaced August 19, 2016

Bellybuttitis 

Inflammation of belly and butt in women.

Period bloating gives me such bad bellybuttitis
Eating to many chocolates makes my bellybuttitis flare up

Having a BIG butt is like having bellybuttitis
How you feel after having a baby is so bellybuttitis

Bellybuttitis by Sunset&Sunrise January 15, 2011

Bellybutton bargain

A bellybutton bargain is someone who is rather large/heavy/fat/overweight/or pleasantly plump.
It can also mean that someone has an obsession for bellybuttons

Person1:Jude man look, it’s a bargain.

Person2: holy shit man you’re right, that is a fucking bellybutton Bargain.

Bellybutton bargain by Press watches March 4, 2023

bellybutton gook 

the dirt, debris, and dead skin cells that collect in the pool of an innie bellybutton.

bellybutton gook is yummy

bellybutton gook by sweet-ass April 29, 2006