1. 谄媚者;马屁精
If you refer to someone as a toady, you disapprove of them because they flatter or are pleasant towards an important or powerful person in the hope of getting some advantage from them.

2. 奉承;谄媚;拍马
If you say that someone is toadying to an important or powerful person, you disapprove of them because they are flattering or being pleasant towards that person in the hope of getting some advantage from them.

1. a person who tries to please someone in order to gain a personal advantage

Synonym: sycophantcrawlerlackeyass-kisser