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

The idiom "out and out" is of English origin and has been in use for centuries. It is formed by repeating the word "out" to emphasize the completeness or thoroughness of something. The repetition of "out" underscores the idea of something being done to its fullest extent. This idiomatic phrase is used to describe something that is complete, thorough, or extreme in a particular way, often to emphasize a specific quality or characteristic.