A term referring to anal intercourse.
In heterosexual contact ads, it refers to a male who prefers to engage in anal intercourse, or a female who wishes to receive intercourse anally.
In the homosexual world, it is used to indicate a person is willing to engage in anal sex, not just in oral stimulation or non penetrative sex.
Unsubstantiated opinion is that it came to denote anal sex, due to the ancient Greek acceptance of anal sex, among males.
Other related terms are 'High Greek' which refers to anal sex, while the counterpart 'Low Greek' refers to vagina sex.
Greek Fashion is another term for anal intercourse, used in many contact or personal ads.