I am not aware of this idiom. Supposedly, it is something that occasionally shows up in a fortune cookie. There is no known idiomatic meaning; it's just something humorous to put into a cookie.
"To be" is not an idiom - it's a verb.
not easily be angry or upset
Pest is not an idiom. It's a word.
The idiom "apple shiner" means the teacher's pet.
The meaning of the idiom in the pink of health means being in good health.
it means she was really upset.
the idiom of really upset is "pissed off"
To upset things in a spectacular way.
"To be" is not an idiom - it's a verb.
not easily be angry or upset
Pest is not an idiom. It's a word.
The idiom "apple shiner" means the teacher's pet.
The meaning of the idiom in the pink of health means being in good health.
The idiom means impress someone is egg on
It's not an idiom - to cope means to deal with, or to handle
"Old hand" is an idiom meaning having lots of experience.
It is not an idiom. It is an expression. The difference is that an idiom's meaning cannot be derived from the meaning of its individual words. In the expression wolfing down food, the meaning is clearly derived from the meaning of the words, and people have been saying it for hundreds of years.