The idiom "pie in the sky" means a plan or idea that is impractical, unrealistic, or impossible to achieve. It often refers to something that someone proposes as a solution to a problem but lacks any actual practicality or feasibility.

The idiom "don't look a gift horse in the mouth" means that one should not question or examine something that has already been given or offered, especially when it comes to accepting a favor, service, or reward.

The idiom "easy come, easy go" means that something gained easily can also be lost easily, or that good fortune tends to come and go without warning. It suggests a lack of stability in a situation.

The idiom "clam up" means to become quiet or close-mouthed, often suddenly or under pressure. It can also mean to refuse to speak or divulge information. The figurative meaning is often used to describe someone who is being uncooperative or evasive.

The idiom "Young Turk" refers to a young man who is arrogant, self-confident, and rebellious. It suggests that the person has a strong sense of self-esteem and wants to challenge authority or traditional values.