The idiom "keep card close to chest" means to remain reserved or guarded about one's feelings, intentions, or plans. It suggests that a person is keeping something important hidden away from others and not revealing it easily.

The idiom "cut and thrust" refers to a lively, competitive, and sometimes confrontational exchange of ideas or opinions. It can also describe a situation where people are arguing or debating intensely.

The idiom "when hell freezes over" is used to describe a situation that is highly unlikely to occur. It is often used as an expression of disbelief or skepticism when someone makes a statement that seems unrealistic.

The idiom "apple of discord" refers to a person or thing that causes conflict or disagreement among people. It can also mean something that is controversial or divisive, causing people to have opposing opinions or take sides.

The idiom "make an ass" means to behave foolishly or stupidly, often in a way that embarrasses oneself or others. It can also refer to someone who is overly confident or arrogant, and whose behavior is deemed inappropriate or out of place.