おかま

Etymology
Compound of.

The development of the slang senses appear to have started from an analogy comparing a man's butt to the shape of certain pots.

Noun

 * 1) a cooking pot
 * 2) a volcanic caldera
 * 3)  one's wife
 * 4)  a serving woman, a female servant
 * 5)  someone's posterior or butt, particularly a man's butt
 * 6)   a gay man, a (male) homosexual
 * 7)   a man who behaves or speaks like a woman; a womanly man
 * 1)   a man who behaves or speaks like a woman; a womanly man