lip 指的是嘴唇，none of your lip不许顶嘴

【例句】
None of your lip! Just help me clean it up.
别顶嘴！帮我清理一下就是了。

Just take out the trash like I asked you to, and none of your lip!
照我说的把垃圾倒出来，别跟我顶嘴！