Here's how the imagery might have evolved:
* Coattails: In the past, coattails were long and flowing, trailing behind a person as they walked.
* Riding on: This part of the phrase suggests a secondary, dependent position.
* Association: Someone "riding on someone's coattails" would be literally or figuratively following closely behind, essentially hitching a ride on the momentum of the person in front.
This analogy translates well to real-world situations where individuals benefit from the reputation, power, or achievements of another, often without directly contributing to the success themselves.
Examples of how this might be used:
* A politician riding on the coattails of a popular party leader.
* A new artist gaining popularity by being associated with a famous musician.
* A company profiting from the positive public image of a successful brand.
The phrase implies a lack of independent achievement and a reliance on the achievements of others.