Over-polite

Full definition of over-polite

Adjective

1. Excessively polite.
• 2007, Raymond W. Gibbs, Herbert L. Colston, Irony in Language and Thought, She can communicate both of these intentions simultaneously by using an over-polite request such as "Would you mind if I asked you to keep the windows closed, please?" Such unexpectedly over-polite utterances are often interpreted as ironic.