Who are you ase again who?

..这不是句子。

ase? 是不是ass？
again？ against？
两个who?

...

Maybe this is your question:

Who are you? Ask again, who?
This is Chinese English and considered very abrupt.
这是中式英语，“你是谁？再一次，谁？”
假如你在英美人士面前问如此的问题是非常不礼貌的。

More polite way:

Who are you?
I'm sorry, I didn't hear that. Could you repeat it.

Hope this helps.

Cheers

Note: 本人已在海外生活了数十载。为了慎重起见，我的答案都与老美或老英交换过意见，你放心使用吧。如有任何问题，可补而述之。

写错了?