from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang A thug hired to intimidate or harm opponents.
- n. Slang A stupid or oafish person.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A wine flagon or cask.
- n. Cheap or inferior cask wine.
- n. A thug; a usually muscular henchman with little intelligence (also known as a 'hired goon').
- n. A fool; someone considered silly, stupid, awkward, or outlandish.
- n. An enforcer or fighter.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an awkward stupid person
- n. an aggressive and violent young criminal
Probably ultimately short for gooney, simpleton.(American Heritage® Dictionary of the English Language, Fourth Edition)
Diminutive slang for flagon. (Wiktionary)
Shortened from gooney, from obsolete gony ("simpleton", c.1580), of unknown origin. Gony was applied by sailors to the albatross and similar big, clumsy birds (c.1839). Goon first carried the meaning "stupid person" (c.1921). (Wiktionary)