From Longman Dictionary of Contemporary Englishbuckaroobuck‧a‧roo /ˌbʌkəˈruː/ noun [countable] American English informal BOTAa cowboy – used especially when talking to children
Examples from the Corpus
buckaroo• And having lost our zeal for the idle etchings of some bored buckaroo, we slink off into the shade.• Or bummed out, or bumped off, or some bumptious buckaroo had burst your bubble.Origin buckaroo (1800-1900) Spanish vaquero “cowboy”; influenced by → BUCK1 