What is the origin of the idiom "enough said" and when to use it?

The origin of the idiom "enough said" is not precisely documented, but it is a relatively modern idiom that has evolved in English to express the idea that a statement or argument is complete and no further discussion is necessary. It is likely that the phrase developed organically as a concise way to indicate that a point has been adequately made or that a matter has been settled. It is typically used to convey that a point has been sufficiently made or that further discussion is unnecessary.