Synonyms of 'pot belly'
He wore a tight T-shirt over his pot belly.
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You can refer to someone's stomach as their gut, especially when it is very large and sticks out.
His gut sagged over his belt.
Thesaurus for pot belly from the Collins English Thesaurus
Someone who has a pot belly has a round, fat stomach which sticks out, either because they eat or drink too much, or because they have had very little to eat for some time.