Vocabulary Building Saying that somebody is fatSaying that somebody is fat形容人肥胖
Fat is the most common and direct word, but it is not polite to say to someone that they are fat:fat 最常用，意思最直接，但当面说某人 fat 不礼貌：
Does this dress make me look fat?我穿这连衣裙显胖吗？
You’re looking fat now.
Overweight is a more neutral word:
I’m a bit overweight.我有点超重。
It can also mean too fat, especially so that you are not fit.
Large or heavy is less offensive than fat:
She’s a rather large woman.她是个大块头。
Big describes someone who is tall as well as fat:
Her sister is a big girl, isn’t she?她姐姐块头挺大的，是吗？
Plump means slightly fat in an attractive way, often used to describe women.plump 常用于形容女性丰满。
Chubby is used mainly to describe babies and children who are fat in a pleasant, healthy-looking way:chubby 主要用以形容婴儿和孩子健康可爱、胖乎乎的样子：
the baby’s chubby cheeks婴儿胖乎乎的脸蛋
Tubby (informal) is used in a friendly way to describe people who are short and round, especially around the stomach.tubby（非正式）用于善意地描述矮胖的人，尤指肚子圆滚滚的。
Stocky is a neutral word and means fairly short, broad and strong.stocky 是中性词，意为矮壮。
Stout is often used to describe older people who have a round and heavy appearance:stout 常用以描述圆胖壮实的较年长者：
a short stout man with a bald head一个矮壮秃顶男人
Flabby describes body parts that are fat and loose:
exercises to firm up flabby thighs使大腿松弛肌肉结实的锻炼
Obese is used by doctors to describe people who are so fat that they are unhealthy. It is also used in a general way to mean ‘really fat’.obese 是医学用语，指患肥胖症，亦可泛指十分肥胖。
Note that although people talk a lot about their own size or weight, it is generally not considered polite to refer to a person’s large size or their weight when you talk to them.
Collocations Diet and exerciseDiet and exercise节食和锻炼Weight体重
put on/gain/lose weight/a few kilos/a few pounds增加／减少体重／几公斤／几磅
watch/control/struggle with your weight关注／控制体重；努力减肥