The idiom "high time" has a figurative or metaphorical meaning that refers to the best possible opportunity or moment for something to happen. It implies a sense of urgency and timing, suggesting that if an action is not taken now, it may be too late.

The idiom "knock on wood" is used to avoid tempting fate or to prevent bad luck from coming after a good fortune has been mentioned or something positive has happened. It's also used to express gratitude or appreciation for something good that has happened.

The idiom "too close for comfort" means a situation or person that is uncomfortable or unsettling due to being too close or intimate with someone, place, or thing. It suggests a feeling of unease or discomfort caused by a proximity that goes beyond what is desired or necessary.

The idiom "lights are on but nobody is home" means that a place or person appears to be active or occupied, but in reality, they are not there or they are not available.

The idiom "long arm of the law" refers to the legal system or authorities that have significant power or influence, especially in criminal matters. It suggests that the reach of the law is far-reaching and can extend to all corners of society.