Potbellied describes a person or animal with a big round stomach that sticks out in front, shaped rather like a pot. It is an adjective, and it comes before a noun most of the time: a potbellied man, a potbellied old sailor. The feeling of the word matters more than the meaning. It is not a neutral, medical description — it is a picture word, slightly rude, sometimes funny. You would use it in a story or a joke, or when describing a stranger to a friend. You would not use it to someone's face, and you would not write it in a polite report. If you need a kind way to say it, English speakers usually go round it: 'he's put on a bit of weight', 'he's got a bit of a tummy'. There is one place where the word is completely neutral and even affectionate: the potbellied pig. That is a real breed from Vietnam, kept as a pet, and nobody is being unkind when they say it. There is also the potbellied stove — an old iron stove with a fat round middle — where the word simply describes the shape. You will see both spellings: potbellied, pot-bellied. Both are fine; the hyphen is a bit more common in British writing.

大腹便便的、凸肚子的（形容人多半帶點取笑意味；越南香豬叫「迷你豬／大肚豬」才是中性用法）