Laugh and grow fat.

心宽体胖。

stay away from fat foods

不吃肥腻的食物

a fat book

厚书

fat profits

丰厚的利润

I don't eat much fat, for example, fatty meat.

我不怎么吃脂肪多的东西，比如肥肉。

put on fat

发胖

fat-burning exercises

燃脂运动

low-fat food

低脂食物