An arrogant, inconsiderate, or dangerous driver, particularly the kind who ignores or harasses cyclists & pedestrians (a merging of gas & asshole). Basically someone who has an inflated ego because they have a
car and you
don't. Not reserved for any one gender
(In extreme cases,
may even be hostile & disrespectful to people who
don't have their particular kind of motor vehicle: bus drivers, cab drivers, pick-up truck people, etc. In this case, the expression
may be modified to "bushole," "truckhole," or "cabhole," as appropriate.)