"What are you up to?" is an idiomatic expression used to ask someone about their plans, activities, or intentions for the near future. It can also be used to express curiosity or concern about someone's actions or motivations.

The idiom "as an aside" means to add something unexpectedly or incidentally to a conversation while the main topic is being discussed. It refers to a comment or piece of information that is not directly related to the main subject but is mentioned in passing.

The idiom "end of story" is used to indicate that there is nothing more to be said or explained about a particular topic, event, or situation. It means that the conclusion has been reached and there is no further information or details available.

"Leg it" is an idiomatic expression that means to run away or flee from something, usually a difficult situation or a person who poses a threat. The phrase can also imply abandoning one's responsibilities or duties.

The idiom "out of action" means to be unable to work or perform a task due to physical or mental incapacity. It can also refer to a situation or event that prevents an individual or thing from functioning properly.