Turning your head while passing a car to check out the other car's driver who was doing something stupid on the road just a minute ago. It could also be used to confirm car/owner stereotypes.
I could hear the big pink Cadillac with shiny rims from miles away. No need for driver's profiling. It was a black dude.
The minivan in front of me almost stopped in the left lane of the highway this morning. I did some driver's profiling and sure enough it was a soccer mom on her phone.
The silver Toyota in front of me was behaving weird. Some driver's profiling revealed it was an old asian lady who drove it.