n.
奉迎者；拍马屁的人

You should take much care of him, and he's a real apple polisher.
你可得多留心那小子，他可是个货真价实的马屁精。

She is a real apple-polisher for the way she's crawling around the boss and making eyes at him.
她是一个马屁精，整天围着老板眉来眼去的。