Green’s Dictionary of Slang

a masculine lesbian; thus manteewalk, to swagger, mantee voice, a deep voice.

1932		‘R. Scully’ Scarlet Pansy 296: Look at her flat breasts, her mantee walk.
1935		A.J. Pollock Und. Speaks.
1941		G. Legman ‘Lang. of Homosexuality’ Appendix VII in Henry Sex Variants.
1965		Guild Dict. Homosexual Terms 29: mantee (n.): The very masculine lesbian; said to be from the French. From this, of course, we have the term mantee walk: a very virile stride.
1972		B. Rodgers Queens’ Vernacular 71: mantee (’40s) adj. found primarily in the two terms: mantee voice (a deep bass) and mantee walk (swagger).
1982		Maledicta VI:1+2 (Summer/Winter) 133: Here are some obsolete or nearly obsolete terms which careless lexicographers continue to list as current […] mantee [...] mantee voice (deep bass) and mantee walk (swagger).