'to duke it out' definitions:

Definition of 'to duke it out'

From: GCIDE
  • duke \duke\ (d[=u]k) v. t. To beat with the fists. [slang] [PJC]
  • to duke it out to fight; -- usually implying, to fight with the fists; to settle a dispute by fighting with the fists. See duke, n. sense 4. [PJC]