no, idioms are NOT proper english. i.e. I left the car running.
running is an idiom, it doesn't actually mean running here - it means the car is idling. when it's used in a way such as "is your refridgerator running" it doesn't mean the refridgerator is running, it means it's working properly.
using an idiom is NOT proper english - and if you think about what that word actually means and repeat the sentence it makes alot less sense.
I admitted to not knowing that was a phrase - and you'd rather try to push the subject that you're not as familiar with as you should be.