'buckaroo' definitions:

Definition of 'buckaroo'

From: WordNet
noun
Local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California) [syn: vaquero, buckaroo, buckeroo]

Definition of 'buckaroo'

From: GCIDE
  • buckaroo \buckaroo\ n.
  • 1. [fr. Sp. vaquero.]a cowboy, especially used of one who breaks broncos; -- used especially in California.
  • Syn: vaquero. [WordNet 1.5]
  • 2. a fellow; a guy. [slang] [PJC]