noun
host in a gay bar; effeminate man who dresses and talks like a woman; young male homosexual
Wasei-eigo term used in Japanese gay subculture. Can refer to a male host in a gay bar, a cross-dressing or effeminate man, or simply a young gay man. Usage may be dated or niche; not a neutral term for all gay men.
wasei-eigo (Japanese-coined English), from gay boy
彼は新宿二丁目のゲイボーイとして働いている。
He works as a host in a gay bar in Shinjuku Ni-chome.
あの人は女装が上手なゲイボーイだ。
That person is a gay boy who is good at cross-dressing.