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general::
Phrase(s): be one’s own man [and] be one’s own master
to be someone who is not controlled by other people; to be an independent person. • Bert longed to be his own master, but at the same time feared losing the security he had as the employee of a large company. • When I go away to college, I’ll be my own man. My parents won’t be able to tell me what to do anymore.
McGrawhill's American Idioms And Phrasal Verbs