Definition

Crusty: slang for someone dirty or unkempt and rough-around-the-edges; also a gruff, irritable, old-fashioned person; sometimes shorthand for the crust punk subculture.

Examples

"He rolled up looking crusty—grease under his nails, ripped denim, and a week-old stubble."

"The crusty old mechanic grumbled about “kids these days” and refused to take cards."

"We met a crew of crusties outside the venue, swapping patches and planning their next DIY tour."