water chestnut
n.— «Best of all, “water chestnut,” which, for reasons that elude me, refers to a Japanese male homosexual. Just be careful next time you’re in a Chinese restaurant, you breeders: who knows what you might be ordering.» —“This yucky winter bug is more efficient than our health service” by Rod Liddle Times (London, United Kingdom) Jan. 6, 2008. (source: Double-Tongued Dictionary)