The idiom "come again" is primarily used to request that someone repeat a statement or utterance. It can be used to clarify misunderstandings or to seek confirmation. The phrase may also be used sarcastically to express disbelief or surprise at what someone has just said.

"Pat on the back" is an idiom that means to praise or congratulate someone for something they have done. It can also mean to express approval or admiration for a job well done.

The idiom "leg up" means to give someone a helping hand or support, usually by providing them with resources, opportunities, or encouragement that they need to succeed. It can also mean to make progress or improve one's position in a particular situation.

The idiom "speak soon" is used to tell someone that you will communicate with them or inform them about something at a later time. It's a polite way of acknowledging their request while not committing to a specific time frame.

The idiom "keep the wolf from the door" means to make sure that you have enough money or resources to prevent a problem from arising, such as financial difficulties or hunger. It can also mean to avoid danger or risk.