2字篇
1. 活该！ serves you(him，her) right! = you deserve (he/she deserves it.)
e.g you failed the test? serves you right for not studying!
2. 活该！ you had it coming!
e.g. a: I gained weight!
b: well，you had it coming because you've been eating so much without exercising.
3. 胡闹 that’s monkey business!
e.g. a: stop fooling around! that’s monkey business!
别再混日子了！你根本在胡闹嘛！
注：本句也可把monkey当成动词说成“stop monkeying around!”
4．请便！ help yourself.
do as you please. (表示不需准许而可取东西，就是请客人自在点，不必太拘束。)
