butter up

US /ˈbʌt.ər ʌp/
UK /ˈbʌt.ər ʌp/
"butter up" picture
1.

奉承, 討好

to flatter someone in order to gain a favor or special treatment

:
He tried to butter up his boss before asking for a raise.
他試圖在要求加薪前奉承他的老闆。
You'll have to butter up the teacher if you want a good grade.
如果你想得高分,就得討好老師。