What is O'ing?
1.
The act of placing bright orange Os on Police cars or vehicles of other significant importance. A point system is in place: e.g. Full size SUVs with the engine running and a fully uniformed officer inside counts as 100 points
We went Oing last night and Matt got 100 points for walking up to a suv police unit and 'slapped an O' with the engine running and a cop watching him