overly polite; excessively polite; polite to a fault
Describes language or behavior that is so excessively polite it becomes unnatural, awkward, or even sarcastic. Often used critically.
That clerk's overly polite service feels rather unnatural.
彼は上司にバカ丁寧な言葉遣いをするので、周りから少し引かれている。
He uses excessively polite language with his boss, so his colleagues are a bit put off.