"As a matter of fact" is an idiomatic expression used to introduce a statement that is going to surprise or interest the listener. It can also be used to emphasize the truthfulness of what is about to be said.

The idiom "flog a dead horse" means to continue discussing or repeating something that has already been discussed or repeated many times, despite its lack of relevance or interest. It suggests that the speaker is taking an old or outdated topic and beating it to death.

The idiom "keep your eyes peeled" means to remain alert or watchful, especially for something specific that you are looking for. It is a metaphorical way of saying that one should keep an eye out for potential dangers or opportunities.

The idiom "light of one’s life" refers to someone or something that brings great joy, happiness, and fulfillment to a person's life.

The idiom "bang for the buck" refers to getting a lot of value or benefit for a relatively low cost or price. It suggests that the product or service being purchased is worth the money spent on it.