Definition.com
The Best man is not really the best man. If he were, then why is the bride not marrying him?
The Best man is not really the best man. If he were, then why is the bride not marrying him?

Confucius say ... at a nudist wedding, you don't have to ask – you can see who the best man is.
A groom's "best man" was initially supposed to serve as an accomplice in case the bride needed to be kidnapped from disapproving parents.