Subject：Don’t try to do a number on me.

A: I have finished my homework already. May I do some surfing?

我已经写完我的作业了。我可以上网吗？

B: How did you finish it in such a short time? Don’t try to do a number on me.

你怎么可能在这么短的时间写完呢？不要玩手段欺骗我。