Green’s Dictionary of Slang

pertaining to something or someone that bends the line between the two sexes; also as n., an act of doing so.

1999		Guardian Weekend 10 July 31: The gender-bending Performance was shelved for 18 months.
2000		‘Ruby Tuesday’ Mon Web En Rose 🌐 Genderbending I guess that is what I do these days. I don’t go out fully dressed, cause I haven’t got any winter-clothes, but I certainly send out mixed gender-signals.
2016		Times Times2 16 Dec. 🌐 The dame needs to find someone to pick on and, no gender-bending allowed here, it’s got to be a man.