What is the X in X-mas?
1887, "Japanese girl whose profession is to sing and dance to entertain men;" hence, loosely, "prostitute," from Japanese, literally "person accomplished in the social arts," from gei "art, performance" + sha "person." Cf. almah, and Athenian auletrides "flute-girls," female musicians who entertained guests at a symposium with music at the start of the party and sex at the end of it.
A Japanese woman who is trained and paid to provide entertainment and amusing company for men.