1) That hot guy/girl in a nearby car that you develop a crush on as soon as you see them... that you will probably never see again
2) A really nice car you see while out driving that you instantly want
1) Passenger: "Oh man..."
Passenger: "That blond in the black Camero next to us is HOT."
Driver: "Woah... I've got a new car crush."
2) Driver: "Dude, check out that Lotus!"
Passenger: "Yeah, I've had a car crush on it for the last few miles."