PHRASAL VERB 奉承;巴结;拍马屁 You say that someone is sucking up to a person in authority when you do not like the fact that they are trying to please the person because of the person's position. 奉承;巴结;拍马屁 [informal, disapproval] [Also VERBPREPOSITION]
She kept sucking up to the teachers, especially Mrs Clements. [VERBPREP. + to]