No, it is a statement. They are telling someone or something to go and live in freedom.
Do what ever you want to do.
It's a boating phrase. Overboard means to go over the board, which is part of the boat. If you go overboard on a boat, you fall out into the water. As an idiom, it has come to mean doing so much that it seems excessive.
A person needs to lose weight.
"To be" is not an idiom - it's a verb.
I'd say that's more of a true statement rather than an idiom. Prices never DO come down - they always go up.
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.
"For free' is grammatically correct. It is an idiom of the English language.
The idiom "give free rein" means to allow someone to have unrestricted freedom or authority to do as they please. It suggests giving someone full control or allowing them to act without any limitations or constraints.
To go clear is a term used in the Church of Scientology. It is a state achieved by using Dianetics to free the self of all subconscious negative or unwanted emotions and traumas.
If you can offer a solution, you are encouraged to try.
Do what ever you want to do.
Don't go bananas when I tell you what I know.
it means go to sleep
It means to go faster
The idiom "go grey" means to start growing grey or white hair, usually as a result of aging or experiencing stress. It can also refer to a person becoming more serious or mature in their behavior.
It means you do not have to pay for dinner,either it is free or someone else will pay for you. This idiom usually means the 'house' or restaurant owner will pay for not 'anyone'.
Ereadingworksheets is a great site to print out free idiom pages. Freelanguagestuff is another site that gives tons of examples as well as the worksheets.