The idiom "yellow streak" refers to a person who is extremely cowardly or timid, lacking courage or bravery in situations that require them.

The idiom "quantum leap" refers to a sudden and significant change or advancement that occurs at an unprecedented speed or level of innovation. It is often used to describe something that has the potential to revolutionize an industry, field, or society.

The idiom "on the blink" is commonly used to refer to something that is about to happen or is in the process of occurring. It can be used to describe a situation, an event, or even a person's behavior.

The idiom "love of life" refers to a person who enjoys living, loves experiences, and takes pleasure in being alive. It's often associated with people who value their lives and are eager to make the most of them.

The idiom "haste makes waste" means that rushing to complete a task can often result in mistakes and errors, leading to a greater amount of time and effort being wasted overall.