From Longman Dictionary of Contemporary Englishtomboytom‧boy /ˈtɒmbɔɪ $ ˈtɑːm-/ noun [countable] WOMANa girl who likes playing the same games as boys
Examples from the Corpus
tomboy• In fact, as a tomboy, I had every intention of following in her footsteps.• Terry and Stephen were not complex characters, but Eileen, always simply considered a tomboy, was sensitive and vulnerable.• Kylie was to audition for the role of a tomboy mechanic called Charlene Mitchell, in a new soap called Neighbours.• My teenage behavior was a carryover from my earlier tomboy identity.• Thus began my transformation from tomboy to stereotypically feminine woman.• She was a joking, teasing tomboy.• Anton remembered a girl, a terrible tomboy.• Jenny, the tomboy, still felt awkward wearing a dress, and so she wore jodhpurs most of the time.Origin tomboy (1500-1600) Tom ( → TOM) + boy 