馬鹿丁寧

ばかていねい【馬鹿丁寧】

excessive [ceremonious] politeness.

～な excessively polite [civil]; polite to a fault.

●ばか丁寧な挨拶(_あいさつ) an excessively polite greeting.

ばか丁寧に

●ばか丁寧にふるまう be excessively polite.