young buck

young buck (plural young bucks)

1. An adventurous or high-spirited young man..
   • 1863, Sheridan Le Fanu, The House by the Churchyard

     Devereux, indeed, being a fast man, with such acres as he inherited, which certainly did not reach a thousand, mortgaged pretty smartly, and with as much personal debt beside, of the fashionable and refined sort, as became a young buck of bright though doubtful expectations—and if the truth must be owned, sometimes pretty nearly pushed into a corner—was beholden, not only for his fun, but, occasionally for his daily bread and even his liberty, to those benevolent doles.