Wiktionary
suckup
n. Someone who flatters excessively
Usage examples of "suckup".
That meant that for Bean to accomplish what he wanted, he could not approach Bonzo in a cringing way, like the suckups who surrounded him as he played, commending him even for his stupid mistakes in game-play.
He's a champion suckup, and he's very smart or he wouldn't have got here.