be asking for trouble 自找麻烦，自讨苦吃

【例句】
The guard asked me to leave immediately unless I was asking for trouble.
保安叫我马上离开，否则我就是自找麻烦。

If you drive so fast in the speed-limited area, you will be asking for trouble.
如果你在限速区开快车，你可是自找麻烦。