面従 めんじゅう腹背 ふくはい
menjūfukuhai

Noun

1. pretending to obey but secretly betraying (someone)

Yojijukugo
文句 もんくがあるならはっきり えよ。君 きみのその態度 たいど面従 めんじゅう腹背 ふくはいそのものだよ。
monkuga arunara hakkiri ieyo. kimino sono taidowa menjūfukuhaisonomonodayo.
If you have a complaint let me hear it. There's a difference between superficial obedience and honest loyalty you know.