very cocky
It's not an idiom because you can figure out the meaning by thinking. A PhD is a college degree meaning you have studied a subject intensively and know a lot about it. If you are a doctor of love, you know a lot about love.
This isn't an idiom that I know about. If you die quietly, you just die without a lot of drama or noise.
To speak with tongue in cheek = Hablar con sorna
This is a Southern US saying meaning 'a whole lot of' something.
"To be" is not an idiom - it's a verb.
Nothing. The phrase is tongue in cheek, as if you were talking with your tongue twisted into your cheek instead of in the middle of your mouth. Tongue in cheek means you are not speaking seriously, but in jest.
Pest is not an idiom. It's a word.
It originates from: The Midsummer Night's Dream by Shakespeare - if two people are together with one person's cheek right by another person's cheek (jowl), they are pretty close indeed.
The idiom "apple shiner" means the teacher's pet.
The meaning of the idiom in the pink of health means being in good health.
Perhaps you mean "crack you up." This is an idiom meaning to make you laugh a lot. The image is of you laughing so hard that you crack apart.
American slang from 1960's, possibly from Vietnam, meaning 'costing a lot.'