noun, plural buck·oes.

Chiefly Irish English. young fellow; chap; young companion.
British Slang. a swaggering fellow.

Origin of bucko

First recorded in 1880–85; buck1 + -o
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bucko

Historical Examples of bucko

  • Did it seem to you as if I was a little too much of the bucko mate to the boy?

    The Portygee

    Joseph Crosby Lincoln

  • I'd not have sent for this bucko if Eileen didn't scare me by faintin'.

    The Straw

    Eugene O'Neill

  • Best place to talk is in the middle of a crowd, as old Bucko Tom used to say.

    The Pirate Shark

    Elliott Whitney

  • The captain is a hard nut and the mates are both of the ‘bucko’ type.

    Boy Scouts in the North Sea

    G. Harvey Ralphson

  • Youll start right in now, my bucko, to learn what they were made for.

British Dictionary definitions for bucko


noun plural -oes

Irish a lively young fellow: often a term of address
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bucko

term of address, originally (1883) nautical and with a sense of "swaggering, domineering fellow." Probably from buck (n.1) in the slang sense of "a blood or choice spirit."

There are in London divers lodges or societies of Bucks, formed in imitation of the Free Masons: one was held at the Rose, in Monkwell-street, about the year 1705. The president is styled the Grand Buck. ["Dictionary of the Vulgar Tongue," 1811]
Online Etymology Dictionary, © 2010 Douglas Harper