(idea) by moJoe Sun Sep 10 2000 at 21:11:28
Uttered loudly out the door by pilots of prop aircraft to alert anyone who should be near by that he is going to start the crafts props spinning and to stand away. A good pilot is a safe pilot, so you may notice that they are trained to do this regardless of how desolate and empty the air field is. A suitable replacement for contact is "clear" or "clear prop".
I like it!