The idiom "apple of eye" is used to describe someone or something that is highly valued, cherished, or beloved by someone or a group of people. It can also be used to refer to an object or place that is considered attractive or beautiful.

The idiom "about to" is used to describe a situation or event that is very close to happening or occurring. It can also indicate that something is soon to happen, or that someone is about to do something.

The idiom "cut the mustard" is an expression used to describe someone who is able to perform well under pressure or difficult circumstances. It can also be used to describe someone who is competent, experienced or skilled at something.

The idiom "out of the frying pan into the fire" means to leave a difficult or uncomfortable situation and enter another that is even more difficult or unpleasant. It suggests that one has been trapped or in danger, and in trying to escape, they find themselves facing something worse.

The idiom "a rolling stone gathers no moss" means that a person who is always on the move, traveling or working, does not accumulate responsibilities or obligations. It implies that such individuals are carefree and do not have any commitments that weigh them down.