Definition & Meaning of "like a rat up a drainpipe"

What is the origin of the idiom "like a rat up a drainpipe" and when to use it?

The idiom "like a rat up a drainpipe" likely originated from the observation that rats are known for their ability to move quickly and easily through narrow spaces, including drainpipes. This comparison highlights someone or something moving rapidly and without hesitation, similar to how a rat can navigate through tight and challenging passages. This expression is used to describe someone or something that is moving swiftly and with great speed. It conveys the idea of rapid and agile movement.