1. pig out 狼吞虎咽、大吃特吃

　　Would you like to pig out with us tonight ?

　　今晚想不想跟我们一起去胡吃海喝一顿?

　　2. eat up 吃光、吃完、尽情吃

　　You can eat up the rest of the food.

　　你可以把剩余的食物吃光。

　　3. eat out 上馆子吃、出去吃饭

　　It's a good idea to eat out once a while.

　　隔段时间在外面吃一顿真不错。

　　4. eat in 在家吃饭

　　Are you going to eat in or eat out?

　　你今天打算在家吃饭还是在饭馆吃饭?

　　5. eat like a bird 吃得很少

　　Girls always eat like a bird in order to keep a slender figure.

　　女孩子们吃的很少，为的是保持苗条的身材。

　　6. grab a bite 随便吃几口垫垫肚子

　　Let's grab a bite before we go.

　　走之前咱们先赶紧垫垫肚子吧!