tomgirln.
/ˈtɒmɡəːl/, U.S. /ˈtɑmˌɡərl/ A girl or young woman who acts or dresses in a manner conventionally more associated with boys; = tomboy n. 2b.In quot. 1879 in the name of a character.
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the world > people > person > child > girl > [noun] > boyish girl
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tomgirl1883
1879 Judy 10 Dec. 280/1 In the playground there is very little playing, and only one member of the establishment romps, and that is Miss Tomgirl Thomas.]
1883 Monthly Packet Oct. 366 One can't play in that way with girls, unless, you know, they are Tom-girls.
1908 Sat. Evening Post (Philadelphia) 3 Oct. 37/3 Der times he chase Mina for bein' a Tomgirl und climbin' on houses.
1967 New Amer. Rev. No. 1. 263 She was..always a golden tomgirl, barefoot, with an adolescent's slouch and a boy's taste for sports and fishing.
2010 Australian (Nexis) 16 Nov. 14 A kick-ass tomgirl, someone who's not in any way manifesting a prissy or fragile element.
This entry has been updated (OED Third Edition, January 2018; most recently modified version published online March 2022).
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n.1883