noun
Colloquial term for a protruding belly, often with rolls of fat. Compare 三段腹, which specifically refers to a belly with three distinct rolls.
See also: 三段腹
最近、運動不足で段腹が気になってきた。
Lately, I've been worried about my potbelly from lack of exercise.
彼はビールの飲みすぎで立派な段腹になった。
He developed a fine beer belly from drinking too much beer.