It depends on how you use it. If you mean literal colors, then it's not an idiom. If you say something like "It's all there in black and white," then it's an idiom meaning that something is printed.
A bibliophile.
It's not an idiom - it means a cup with some tea in it. NOT your cup of tea, however, is an idiom - it means that something is not to your liking or preference.
It means that when a person does not know about certain subjects or objects he automatically assumes that he does not like it or that it is not something for him.
I think it means that that person agrees with that others persons idiom and that it fit that question that the teacher or whoever asked that question.
Can you figure out the meaning literally? Then it's not an idiom. The person is saying that they didn't want to use force to move someone away from something.
This Filipino idiom means being unable to break eye contact. It implies that the person is staring intently or fixedly at something or someone.
No because an idiom is a phrase that seems to mean one thing, but actually means another. "Copycat" is slang meaning that someone is just copying something that another person said or did.
That there's a person there, you are dreaming or that something unexplained enjoys letting people see them at midnight.
It means you have an understanding of what makes a person tick. You know how to make them mad or beat them at something.
A sadomasochist is a person who enjoys causing pain to others. It is similar to a masochist, a person who enjoys receiving pain.
The idiom "made his heart feel heavy" suggests that someone or something has caused emotional pain or sadness. It implies that the person's heart is burdened with negative emotions such as guilt, sorrow, or regret.
It depends on how you use it. If you mean literal colors, then it's not an idiom. If you say something like "It's all there in black and white," then it's an idiom meaning that something is printed.
This is not an idiom. An idiom is an expression whose meaning cannot be deduced from its elements. To go through fire and water for someone is easily understood to mean to make a special effort and to undergo difficulties for that person's sake.
Someone who enjoys disco dancing.
"Be on the same page" is an idiom that means to agree or have the same understanding or opinion about something.
A boat person is a person who enjoys boating or yachting.