and IDIOM is like a phrase, that people speak like this..
Ex: Oh that old man is about to kick the bucket!
the old man isn't literally going to go kick a bucket, he's just about to die.
or another example
Ex: i feel like im on top of the world!
you dont really feel like your on top of the world you just feel like really happy or satisfied.
****idiom dont mean what they are really saying, its just like a saying. (expression)