One of the additional bones that obese people seem to have
"I'm not fat, I'm just big-boned"

"Well fuck me, That's some bellybone you have"
by Anorexic bitch(tee-hee) August 26, 2013
Get the Bellybone neck gaiter and mug.
someone who typically has long limbs, and can’t use them for they are too incompetent, normally makes stupid decisions
Is your name Morgan because you’re a bellybone.
by angus butterworth March 16, 2019
Get a Bellybone mug for your cat Riley.
A shock site, hosted by the Meat Spin Network, that shows a man inserting a very large, long dildo into his anus. He proceeds to sit upright so that the dildo is seen pushing his stomach outward. Not extremely shocking, like other shock sites, but still strange.
"Wanna have sex?"

"Yeah! Only if you give me a bellyboner though!"
by descendants1111 October 31, 2011
Get a bellyboner mug for your mama Helena.
When female or gay male lies on ones belly while the other partner bones them repeatedly until ejaculation.
Girl-'can we bellyboned tonight?'
Boy-'fuck yeah!'
by well_meow September 11, 2014
Get a bellyboned mug for your Facebook friend Rihanna.