köken: Unknown. Possibly borrowed from Breton gouin, from Middle Breton gouhin, from Proto-Brythonic *gwėɣin (“sheath”), itself borrowed from Latin vāgīna (“vagina”); in which case, a doublet of gaine (“sheath”) and vagin (“vagina”).
Used other than figuratively or idiomatically: see お, 鍋. · butch; dyke; or, a trans man · (nickname for) a maidservant
köken: From 御(お) (o-, honorific) + 鍋(なべ) (nabe, “stew pot”). The LGBT slang sense is by analogy to おかま (okama), literally “rice pot”, a slang term for gay or feminine men. The “maidservant” sense comes from association between maids and cooking or serving food.