Definition of homeboy noun from the Oxford Advanced American Dictionary

 

homeboy

 noun
noun
NAmE//ˈhoʊmbɔɪ//
 
(informal)
 
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a male friend from the same town as you; a member of your gang (= a group of young people who spend a lot of time together and often cause trouble or fight against other groups)
See the Oxford Advanced Learner's Dictionary entry: homeboy