"To be" is not an idiom - it's a verb.
The idiom "apple shiner" means the teacher's pet.
It is actually an idiom.
My Favorite IDIOM Is, When Pigs Fly.
Pest is not an idiom. It's a word.
The idiom for "he spilled the beans" is to "let the cat out of the bag," meaning to reveal a secret or disclose confidential information unintentionally.
A British police euphemism meaning to keep out of trouble, commit no crimes
In Australian idiom, a "snitch", an informer, someone who runs to authority to tell tales. Also found as a verb "he was dobbed in to the police".
"made of with" .... stolen, thieved ie - "That naughty man made off with my wallet, I must call the police"
Idiom is correct.
what is a idiom about a cat
"To be" is not an idiom - it's a verb.
The idiom "apple shiner" means the teacher's pet.
An idiom misuse is to use and idiom in a wrong way that doesn't make sense.
The idiom for 'larger than life' is "a force of nature."
That would be the third degree.
"Tight lipped" means someone is not saying much about a certain thing. Example: The police have been very tight lipped about the details of the crime.