to watch your step


MEANING:   to be careful
EXAMPLES:  


  1. If you go to Iraq, you had better watch your step because it is very dangerous.

  2. Obama has to watch his step when dealing with Republicans. 

  3. Watch your step!  The sidewalk is icy.

  4. You taking Finance 356 this semester?

    Yeah.

    Who's your Professor?

    Dr. Jenkins.

    ​    Bad luck!  He's a killer when it comes to grades.  Watch your step with him and don't piss him off.