The idiom "on/to hand" means to be in possession of something or someone, either literally or figuratively. It can also mean to have control over something, especially when referring to a situation or event.

The idiom "old hat" refers to something that is outdated, worn-out, or no longer relevant, often in a figurative sense. It can also refer to someone who is old-fashioned or traditional in their views or behavior.

The idiom "suited and booted" is used to describe someone who is well-dressed and ready for an occasion or activity. It can also be used to describe a situation that is ideal or perfect for someone or something.

The idiom "from A to Z" means to cover or discuss everything about a topic, from the beginning (A) to the end (Z). It is used to convey that someone has talked about or learned every aspect of something.

The idiom "smitten with" means to be extremely attracted or fond of someone or something, usually to the point of being unable to resist it. It implies a strong emotional connection and can be used to describe both romantic love and affection towards a person or thing.