butter up
US /ˈbʌt.ər ʌp/
UK /ˈbʌt.ər ʌp/

1.
nịnh bợ, lấy lòng
to flatter someone in order to gain a favor or special treatment
:
•
He tried to butter up his boss before asking for a raise.
Anh ta cố gắng nịnh bợ sếp trước khi xin tăng lương.
•
You'll have to butter up the teacher if you want a good grade.
Bạn sẽ phải nịnh bợ giáo viên nếu muốn có điểm tốt.