It's not an idiom because you can easily figure out what it means. If you do something "at any cost," then you don't care what happens or who gets hurt.
It means "I can't take any more."
It means that you can be easily be woken up by any small sound.
This is not an idiom - it means exactly what it says. You will use any means to achieve your goal.
Body is a word -- it can't be an idiom. You can find many meanings for this word in any good online dictionary.
It's not an idiom because you can easily figure out what it means. If you do something "at any cost," then you don't care what happens or who gets hurt.
The idiomatic expression "smooth as honey" refers to something that is very smooth, pleasant, or easy-going. It suggests that a situation or experience is flowing effortlessly, without any disruptions or obstacles. The comparison to honey, which is viscous and has a pleasing texture, conveys a sense of comfort and satisfaction in the context of the expression.
The idiom "to read at any cost" means to be willing to do whatever it takes to read or access something, regardless of obstacles, challenges, or difficulties. It emphasizes the strong desire or determination to obtain and engage with written material.
It means just what it sounds like - no matter what the cost, do it.
A "crash course" is a very fast lesson. This usually means that someone learns something without any real training, through trial and error or experience.
The question doesn't really make sense - idioms use words the same as any other phrase does. The words communicate meaning to others. The only difference between an idiom and another phrase is that the idiom has a meaning that is not literal and cannot readily be discerned by context.
Are you asking if this expression would be acceptable in formal English? It may not be the worst usage in formal English, but I would look for another way to say it. It is idiomatic, and may not give a consistent meaning to any reading expecting standard usage.
"Beg" is not an idiom. An idiom is a phrase that you cannot understand unless you know the definition. "Beg" is a word that you can look up in any dictionary.