The name came from the greased back hairstyle, which involved combing back hair using hair wax, gel or pomade(also called pomatum). The greaser style was imitated by many youths not associated with gangs, as an expression of rebellion. many greasers do assemble as a "car club" or a "krew" . Common hairstyles included the pompadour, the "Duck's Tail" and the more combed-back Folsom style.
"check out those greasers, i bet they are heading to the car show"