Someone who is obsessed with talking about car. You will struggle to change subject and even if you do, it will end up back at cars. Their banter consists solely of cars.They frequent car park(McDonald, Golfworld etc) in their shitty cars to talk about there loud farting cars. However not all people who like cars, are car fags. Basically if the person can talk about anything other then cars they are not a car fag even if they have some riced out shitter.
All the car fags, are talking car fag shit over in Mcdonalds