i'm not sure where this originates from, but jura's answer is one explanation， 跪地求饶的意思。 In the context of pop songs, sometimes "you got me on my knees" 可以用在爱情上。好像，我爱你到无法自拔，所以"you´ve got me on my knees"。。你能影响我的一切因为真的和爱你。。之类。不知道这样解释会清楚吗。哈哈哈哈..我不懂怎样说的更明白。

These are the lyrics to a song. Also it means that you are the the mercy of the person who says this to you. In olden times people would get down on their knees & pray for mercy in order not to be executed.

shit i don knw da answer :(:(:(:S:S:S