What is the origin of the idiom "quick off the mark" and when to use it?

The idiom "quick off the mark" originates from the world of sports, particularly in the context of track and field events. In a race, athletes start from a set position or mark, and the one who reacts and begins running immediately upon the starting signal is said to be "quick off the mark." It is now used to describe someone who is exceptionally quick to react or respond to a situation. It suggests that the person is alert, agile, and often one step ahead of others in taking action.

What is the origin of the idiom "slow off the mark" and when to use it?

The idiom "slow off the mark" likely originates from the world of racing, particularly in track and field or horse racing. In these contexts, being "off the mark" refers to the starting line or point where a race begins. When a participant is slow off the mark, it means they did not start the race quickly or efficiently, putting them at a disadvantage right from the beginning. It is used to describe someone or something that is not quick to react, respond, or take action in a particular situation.