Kathoey or katoey is a Thai term that refers to a transgender or an effeminate gay male in Thailand. While a significant number of Thai people perceive kathoeys as belonging to a third gender, including many kathoeys themselves, others see them as either a kind of man or a kind of woman. Related phrases include sao (or phuying) praphet song (,"a second kind of woman") and phet thi sam ("third gender"). The word kathoey is of Khmer origin. It is most often rendered as ladyboy in English conversation with Thais and this latter expression has become popular across South East Asia.