noun
potbelly; paunch
Colloquial term for a protruding, drum-like belly; often used humorously or self-deprecatingly.
最近、運動不足で太鼓腹になってきた。
Lately, I've been getting a potbelly from lack of exercise.
彼はビールの飲みすぎで立派な太鼓腹だ。
He has a splendid paunch from drinking too much beer.
Adverb describing a plump, corpulent appearance; 太鼓腹 is a noun for the belly itself.
Compound of 太鼓 (taiko, 'drum') and 腹 (hara, 'belly'), referring to a belly shaped like a drum. The reading ばら is a voiced form of はら (rendaku).