Meaning : A very studious person, intellectually gifted in the field of academics, a very intelligent person Example : I think Jane will do well in her finals. She has always been a kind of egghead from elementary school all the way through college.
2. “Big cheese”
Meaning : An important and influential person Example : Do you know Peter? He’s a big cheese at the company, he may help you to get a good job there.
3. “Couch potato”
Meaning : A very lazy person who watches too much TV Example : My uncle is a couch potato, you never see him without the remote control in his hand.
4. “Tough cookie”
Meaning :A very determined person, durable and robust person, a person who is difficult to deal with Example : There is a tough cookie on the phone, he insists to talk to the manager, shall I put him through?
5. “Top banana”
Meaning :leader, boss, the chief person in a group, the head of a project Example : I don’t know when we’ll finish, ask Jack, he’s the top banana here.
6. “Bad apple”
Meaning : Troublemaker, criminal Example : He’s a real bad apple. If I were you, I wouldn’t let my daughter go out with him.
7. “Sour grapes”
Meaning : Pretending to dislike something that you can’t have Example :The losers say they don’t mind that they couldn’t win the cup, but I’m sure this is only sour grapes.
8. “Lemon law”
Meaning : An American law that protects those who buy defective cars or other consumer goods Example :Unfortunately, his new car had an engine defect, but he received a complete refund in accordance with the lemon law.