plebeian

Short definition from Wiktionary

Noun

1. 1
   A member of the plebs, the common citizens of ancient Rome.
2. 2
   A commoner, particularly (derogatory) a low, vulgar person.

Adjective

1. 1
   Of or concerning the plebs, the common citizens of ancient Rome.
2. 2
   Of or concerning the common people.
3. 3
   Common, particularly (derogatory) vulgar, crude, coarse, uncultured.