backbiter

基本解释

She is nothing but a backbiter.
她是个当面诌媚、背后中伤人的东西.
Besides, he's a bit of a backbiter, and he'd give us a bad name and make things awkward for us if we tried to force something out of him
他这人又很刁赖，要从他的手里挖出什么来，怕也是够麻烦的罢?
“Hold your tongue, backbiter,” said Dolgorukov. “It's not true, there are two Russians: Miloradovitch and Dohturov, and there would have been a third, Count Araktcheev, but for his weak nerves.”
“爱搬弄是非的人，请您住嘴。”多尔戈鲁科夫说，“您所说的是假话，现在已经有两个俄国人了：米洛拉多维奇和多赫图罗夫，可能会有第三个，那就是阿拉克切耶夫伯爵，不过他的神经很脆弱。”
backbit
v. 背后诽谤;背后中伤