butter up

To praise or flatter excessively

諂媚，夸耀：極度地贊美或奉承

You're always buttering up the boss.

你總是拍老板的馬屁

look as if butter wouldn't melt in one's mouth

(informal)appear gentle or innocent while typically being the opposite

(非正式)假裝天真無邪（或極嫻靜）；表面上一副老實樣

butter someone up

(informal)flatter or otherwise ingratiate oneself with someone

(非正式)奉承某人，巴結(jié)某人