n. 1.  A hired man, especially in the western United States, who tends cattle and performs many of his duties on horseback. Also called  cowman; also called regionally  buckaroo,  vaquero,  waddy2. See Note at  buckaroo 2.  An adventurous hero. 3.  Slang   A reckless person, such as a driver, pilot, or manager, who ignores potential risks.  | 
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