When people, states, etc, threaten to use force as a way of getting what they want, especially when they are unlikely to use force, they are sabre-rattling.
If you rub salt in a wound, you make someone feel bad about something that is already a painful experience.
'Pour salt on a wound' is an alternative form of the idiom.
If someone escapes scot free, they avoid payment or punishment. 'Scot' is an old word for a tax, so it originally referred to avoiding taxes, though now has a wider sense of not being punished for someone that you have done.
A searching question goes straight to the heart of the subject matter, possibly requiring an answer with a degree of honesty that the other person finds uncomfortable.
(AU) If you see which way the cat jumps, you postpone making a decision or acting until you have seen how things are developing.
If you have a question about idioms, ask us about it in our Idioms Discussion Forum. If you know of an idiom that you would like to be listed here, please use our online form to suggest an idiom.
Members Get More - Sign up for free and gain access to many more idioms and slang expressions. Register now.