What is the origin of the idiom "rotten egg and when to use it?

The idiom "rotten egg" is a term that originally referred to an egg that had gone bad and was no longer fit for consumption. The term has been used metaphorically to describe a person who is considered to be a failure or a disappointment, particularly in a humorous or derisive way. The exact origin of the idiom is unclear, but it likely dates back to the early 20th century. It is often used to describe a person who is unsuccessful or inept, particularly in a humorous or sarcastic way.