A: The teacher was too hard on his students, especially on the boys.
B: Yeah, I agree. But some boys were chewing thefat in class.
A: The teacher was really annoyed.
B: But I don't think they should have physical punishment anyway.
A: Maybe you'er right.
chew the fat
Chew the fat就是“闲扯，闲聊”的意思。
e.g. The older women meet to chew the fat with their neighbors every morning.
e.g. Uncle George likes to come over to chew the fat every Sunday afternoon.
1. be hard on：对......苛刻
e.g. As soon as I had entered the yard, I saw that the storm had been hard on Dollie's flowers.
e.g. Don' t be too hard on the boy ; he didn't mean to do it.
2. in class：在课堂上
e.g. Once we caught him dozing off in class.
e.g. Children who talk too much in class get under the teacher's skin.