What is au contraire?

"Au contraire" is a French phrase that translates to "on the contrary" in English. It is used to express disagreement or to indicate that the opposite of a previously stated idea or assumption is true. In conversation, it often introduces a counterargument or a differing perspective.

The phrase is sometimes used in English as a borrowing to add a touch of sophistication or humor, often in discussions or debates to highlight contrast or opposition to a preceding statement.