Blubber belly:
You know you're fat when your belly gets wedged between two cars trying to exit your vehicle.
Seeing a woman's belly squished into the steering wheel is a big turn on. Watching her thighs jiggle as she works the pedals, another turn on. The best is when a BBW drives a stick shift vehicle, her arm fat jiggles in addition with every shift.
My wife is more bottom heavy and while her belly doesn't hit the wheel, many cars' seats and steering wheel can't adjust enough for her thighs to fit. Years ago I taught her to drive stick shift, which she mastered and I found sexy.
Ever since childhood I've had a thing for big girls and cars. It started with a BBW school bus driver. I would run to the bus after school and sit up front so I could watch her drive. She was really sweet and probably found it cute that I had a crush.
While I never saw a BBW stuck wedged in between two cars, if ever I did it would certainly be exciting, particularly if it was my car she parked next to and she needed my help to squeeze through.