a sexual act in which a man puts his penis in somebody’s, especially another man’s, anus 鸡奸 Word OriginMiddle English: from medieval Latin sodomia, from late Latin peccatum Sodomiticum ‘sin of Sodom’ (after the Bible, Gen. 19:5, which implies that the men of Sodom practised homosexual rape) (see Sodom and Gomorrah).