What does it mean when I put my car in park and shut engine off and the car rolls ?

you must USE YOUR PARKING BRAKE!!~(sheesh, thought they taught that in driving school.)

Parking Gear Prawl, aka dowel pin sheared off in transmission or linkage not actually putting it in Park....Pay attention please to Judge Roy. Turn wheels to curb if on street. Chock wheels. Chain it to a tree.

You're right it's Pawl nor Prawl that I wrote

wondered about that....simple typo...or you've been eating a lot of prawns and had that on your mind...or were actually eating breaded prawns (leftover from restaurant)~

some sort of chemical imbalance in brain, a typo actually ..I think t~shoes and I were writing at the same time, we said the same thing

no...beautiful, but perhaps inept in the way of the automobile...my sister is this way...one gets a real feel for the car or truck...a kind of sensitivity to the workings and knows when something is up...a tire is low...the shocks seem to have stopped absorbing bumps...a person knows from intimacy with their automobile....NOW parking brake...obviously you DO not drive stickshift, 'cause this is a part of the program...one would simply not just leave it in gear counting on the internal resistance of the motor able to stop the wheels from turning...sakes no, you MUST use your parking brake...find it ABSURD that you did not even think of this gadget...have serviced many cars where the thing was NEVER used and was seized in position and would have the rust removed before it could operate properly...so you are in this ballfield...not to blame you, but as I was saying intimacy with your machine takes time to develop.~