Definition of "bucko" [bucko]

• A blustering or bossy person. (noun)
• Irish A young man; a lad. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Sorry, bucko, that is an anti religious liberal lie."
• "It was the doctrine of his officers that he could not be ruled by anything short of violence, and the man to tame and hammer him was the "bucko" second mate, the test of whose fitness was that he could whip his weight in wild cats."
• "During the ten years in which he had been in command, he was relieved of much of the executive work that had made him famous when he stood watch, but was always ready to justify his reputation as a "bucko" should friction with the crew occur past the power of his officers to cope with."