"Pushing up daisies" is an idiom used to describe someone who is deceased or has passed away. The phrase comes from the act of bending down to push a daisy back up when it has been knocked over, as if to bring it back to life.

The idiom "a quick buck" is used to describe a situation or business opportunity that provides immediate financial gains, often without much effort or time required. It implies that the person who takes advantage of this opportunity will receive a significant amount of money quickly.

The idiom "shot in the arm" means a sudden and significant boost or improvement. It can also mean a positive development or progress that provides motivation or encouragement.

The idiom "a man of action" refers to a person who prefers to act on their ideas rather than just talking about them. It describes someone who is capable of taking decisive and practical steps towards achieving their goals, instead of simply theorizing or planning.

The idiom "fit as a fiddle" means to be healthy, strong, and in good physical condition. It is a figurative way of expressing that someone is in excellent health and has no medical issues or physical disabilities.