The idiom "greenhorn" refers to someone who is inexperienced or new to a particular activity or field, often implying naiveté or lack of knowledge. It originally referred to young or inexperienced cattle, but has evolved to describe people who are still learning the ropes. This term is often used in informal contexts to highlight someone's lack of familiarity with a situation.
meaning of greenhorn
It originated with cowboys who noticed the horns on young cattle had a greenish tint. So in the Old West, a person who was young or inexperienced in his craft or trade was called a greenhorn.
"To be" is not an idiom - it's a verb.
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.
No. This is not an idiom. An idiom is a group of words whose meaning is different from the meanings of the individual words. So it is not easy to know the meaning of an idiom. For example 'Let the cat out of the bag' is an idiom meaning to tell a secret by mistake. The meaning has nothing to do with cats or bags. "Treat others like you would want them to treat you" is a saying,
A greenhorn is someone who is new in a job or new to a skill.