The idiom "dog in the manger" refers to a person or thing that takes advantage of or exploits others. It originates from the story of a dog that steals food from a manger (a trough for feeding animals), leaving nothing for the actual owner of the food.

The idiom "cry wolf" means to make a false accusation or warning, often as a form of manipulation or deception. It is derived from the fable about a shepherd who repeatedly cries "wolf!" to scare off his flock of sheep, but eventually no one believes him when he truly calls out for help.

The "call of the wild" refers to a strong desire to be outdoors, enjoying nature, and participating in physical activities such as hunting or hiking.

The idiom "give airs" means to behave pretentiously or to put on an air of superiority. It refers to someone who is behaving as if they are more important or capable than they actually are.

The idiom "hit the books" means to study or prepare for exams or tests intensely, often by reading textbooks or studying materials related to a particular subject. It is commonly used to describe someone who is studying hard and focused on their academic performance.