Occurring mostly with women, It's a phenomenon that occurs due to having a fat stomach and weak and flabby obliques muscles, often leading to a sagging appearance on the sides, but a upward bridging point under the navel, creating a "butt" appearance. Similar to a bumstache. The size of the gut butt varies based on the circumference of the individual.

It is not uncommon for those suffering from gut butt to have a stomach than their actual butt. Gut butt may be the result of an uncontrolled fupa, but it does not have to be in origin.

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Belly pooch, bloated gut, intestinal bloat, the bloaties, when your gut sticks out more than your butt does

When someone has gained so much weight that when they laugh their stomach claps harder than their hands do.