A sense of humor refers to one's ability to perceive, understand, appreciate, and express comedy or humor. It is a person's perspective on finding things funny or amusing and their willingness to share or participate in humorous situations.

The idiom "play cat and mouse" refers to a game or situation in which two people or groups are constantly trying to outsmart each other, with one person or group always being one step ahead of the other.

The idiom "good grief" is an exclamation used to express surprise or shock. It can also be used as a euphemism for curse words. The literal meaning of the phrase is an expression of relief that one did not actually say or do something bad, but instead said or did something milder.

The idiom "taste of own medicine" refers to experiencing the same unpleasant or negative treatment that one has inflicted on others. It's a metaphorical expression used to describe a situation where someone gets what they deserve or experiences the consequences of their actions.

The idiom "recharge one’s batteries" means to rest or take a break from doing something in order to refresh one's energy, mind or body. It is often used when someone needs a break from mental or physical activity to regain their strength or focus.