母鸡

母鸡	mǔ jī	hen / don't know (humorous slang mimicking Cantonese 唔知, Jyutping: m4 zi1)
母	mǔ	mother / elderly female relative / origin / source / (of animals) female
鸡	jī	fowl / chicken / CL:只 / (slang) prostitute
鸡	jī	variant of 鸡