ass: 臀部，屁股 kisser是亲吻的人，由此延伸一下，ass-kisser“马屁精、拍马屁的人”。

【例句】
You are still getting a base pay because you're not an ass-kisser.
你到现在还是领底薪而已，因为你不是个马屁精。

Peter is such a typical ass-kisser and he is always telling the boss how great he is.
彼得真是个不折不扣的马屁精，就只知道恭维老板。