pleb

Short definition from Wiktionary

Noun

1. 1
   A commoner; a member of the lower class of a society.
2. 2
   A common person; an unsophisticated or cultureless person.
3. 3
   A freshman cadet at a military academy.

Adjective

1. 1
   Of or concerning the lower class of a society.
2. 2
   Undistinguished, commonplace, unsophisticated, vulgar, coarse.