The idiom "couldn’t care less" means to be completely uninterested or indifferent towards something. It is a strong expression of disinterest, indicating that the speaker could not care less about the topic at hand.

The idiom "as calm as a toad in the sun" means to be completely relaxed, tranquil, and at ease. The figurative meaning of this idiom is that a person who appears calm and composed has no inner turmoil or discomfort.

"So so" is an idiom that means something is mediocre or average, neither particularly good nor particularly bad. It can also mean that the situation is neutral or indifferent.

The idiom "below the belt" is used to describe something that is dishonest or unfairly advantageous, typically a policy or practice that benefits one group at the expense of another.

The idiom "sleep on" means to wait or delay taking action until a better opportunity presents itself, or not to worry about something because it will be sorted out later.