1. gain weight: 增加体重。例如：

People who drink diet soft drinks don’t lose weight. They gain weight, a new study finds.

2. super size person: 超大之人。例如：

No more hamburgers, I don’t want to be a super size person.

3. heavyset: 体格魁伟的。例如：

He was tall and heavyset.

4. nutritionally endowed: 营养丰富的。例如：

Though garlic is a nutritionally endowed food, it is only consumed in small amounts.

5. gravitationally challenged: 受地球引力挑战的。例如：

That girl is gravitationally challenged.

6. well-built: 体格健美的，体型匀称的。例如：

That girl is well-built.

7. stout¹ 结实的，壮实的。例如：

She is getting too stout for her dresses.

8. big-boned: 骨骼粗大的。例如：

I’m not fat, just big-boned.

9. overweight: 超重的。例如：

Overweight in a child should not be neglected.

10. chubby²: 胖乎乎的(多指小孩和女子)。 例如：

The baby has a chubby face.

11. buxom³: 体态丰满的。例如：

A generation ago, fat babies were considered healthy and buxom actresses were popular, but society has come to worship thinness.

同样，“瘦”不能说skinny，它是“皮包骨”的意思。要形容一个人苗条应该用slender,slim，或delicate。“减肥”则可以说lose pounds或lose weight。

总之，“胖”和“瘦”是英美人敏感的话题， fat和skinny的使用要十分小心，注意回避。但是有一个例外就是phat(妙，好，酷)，是fat 的异体词，在口语中常常用于赞美美妙的东西，相当于cool。例如：

The car is really a phat.