From Longman Dictionary of Contemporary Englishbarrel-chestedˌbarrel-ˈchested adjective HBHa man who is barrel-chested has a round chest that sticks out
Examples from the Corpus
barrel-chested• At its centre was a man of less than average height with thinning hair and a somewhat barrel-chested build.• A barrel-chested man in a well-cut suit stood to greet them, gripped her hand firmly.• He was a large, barrel-chested man in his early forties, his black hair plastered to his skull with hair cream. 