poor white trash

First attested in 1835.

poor white trash (uncountable)

1. (US, obsolete, ethnic slur, used by black slaves) White person or people employed in a servile position, for example, as a butler.
   • 1835 May 30, The London Literary Gazette; and Journal of Belles Lettres, Arts, Sciences, &c.of the collected Literary Gazette […] for the year 1835‎, number 958, London, page 338:

     In the south, there are no servants but blacks; for the greater proportion of domestics being slaves all species of servitude whatever is looked upon as a degradation; and the slaves themselves entertain the very highest contempt for white servants, whom they designate as ‘poor white trash’.

2. (US, modern, derogatory, ethnic slur) White trash; poor, uneducated white person or people of low social status.

• white trash