corncracker

Noun

corn-cracker (plural corn-crackers)

1. (US, dated, derogatory, mildly) A lower-class white person in the Southern United States.
   • Our summons was answered by its owner, a well-to-do, substantial, middle-aged planter, wearing the ordinary homespun of the district, but evidently of a station in life much above the common "corn-crackers" I had seen at the country meeting-house.1862, James R. Gilmore, chapter 12, in Among the Pines, or, South in Secession Time

   Synonyms:

   cracker

2. (US, dated) An agricultural machine for cracking corn kernels.
   • A subscriber at Burnsville inquires for a corn cracker which he can work by attaching it to Warren's horse power. There is a corn cracker made here, but it is not a very superior machine.1847 August, The Prairie Farmer, Volumes 6-8, "Editor's Table", p. 261 (Google books)