'goon' definitions:

Definition of 'goon'

(from WordNet)
noun
An awkward stupid person [syn: lout, clod, stumblebum, goon, oaf, lubber, lummox, lump, gawk]
noun
An aggressive and violent young criminal [syn: hood, hoodlum, goon, punk, thug, tough, toughie, strong-armer]