pleb

Etymology

A clipping of plebeian and plebe, sometimes also understood as a back-formation from plebs.

noun

1. A commoner, a member of the lower class of a society.
2. (derogatory) A common person, an unsophisticated or cultureless person.
   You're under my roof, you pleb. 1795, John O'Keeffe, Life's Vagaries, act V, scene ii, line 85
3. (US, slang, usually derogatory) A freshman cadet at a military academy.
   I found some of the novices, plebs they are called, home-sick, and weary with their discipline. 1838, Caroline H. Gilman, The Poetry of Travelling in the United States..., page 76
   At Annapolis, the natives are crabs, the freshmen plebs, the sophomores youngsters. 1922, Dialect Notes, number 5, American Dialect Society, page 189

adj

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