The part of a country's economic activity that is unrecorded and untaxed by its government.
This isn't an idiom because you can figure out what it means pretty easily. It's an exaggeration - pretending that your money is so eager to leave your pocket that it can burn a hole to get out.
The full idiom is "Free things can be very expensive". An idiom is a turn of phrase that seems to mean nothing, but requires thought to unravel. The reason free things can be expensive, is that they're generally free because they're not very useful.
This means that she can't wait to spend the money she has.
It means that when someone gets money, they often spend it very quickly, so they don't have it for long.
I think you mean "no great snakes," and it means "no big deal."
I think you mean "no great snakes," and it means "no big deal."
It's a done deal - there is no chance of failure.
To take an unhappy decision or result and deal with it resolutely
"He lost his shirt" IS an idiom.
It's not an idiom - to cope means to deal with, or to handle
"Cutting" a deal just means making one. You're compromising, or making an agreement. "Cut" is used in the sense of stamping out or creating.
Usually this idiom is used in a battle or military application in which you remove the most dangerous opponent or the leader first, so that the other enemies will be easier to deal with.
Monty Got a Raw Deal was created in 1992.
What happens when something gets in your hair? It's annoying, right? You have to stop and deal with it. Getting in your hair means interrupting you, getting in your way in an annoying fashion. A similar idiom is getting on your nerves.
Let's go chew the fat. It means to talk, to have a conversation. Usually over some deal or personal business.
It is not an idiom, it means your nose is itching.