What is "greasers"

Usage examples of "greasers".

Instead of Nazi soldiers, clowns and punkers and greasers and space creatures and God-knows-what-all roamed the outer edges of the area trying to control the crowd of mainly unruly teenagers who pushed into turnstiled entryways, shoving their tickets into the hands of other oddly costumed types.

He merely grunted, having no idea what greasers were, and thinking that they sounded even worse than the art teacher.

More than her talk of greasers and art teachers, it made her a foreign creature.