The idiom "dollars to donuts" means that something is true or probable with a high degree of certainty. It is used to express confidence in an opinion or prediction.

"Cast aspersions" is an idiom that means to make accusations or cast doubt on someone's character, motives or intentions without any evidence to support these claims. It is often used to describe a situation where someone is being unfairly judged or criticized.

"At sixes and sevens" is an idiom that means to be confused or disorganized. The phrase can also mean being uncertain, hesitant, or undecided about something. It can refer to a person, a situation, or even an event.

The idiom "diamond is forever" means that a diamond, as a symbol of love and commitment, will never lose its value or importance. It implies that the love and commitment represented by the diamond will also last forever.

The idiom "like a cat on a hot tin roof" is used to describe someone who is uncomfortable, anxious, or nervous in a social situation. This phrase refers to the idea that cats are known for their discomfort with heat and may suffer from anxiety when placed on a hot tin roof.