Gomorrahy noun3 •(humorous, rare) Unspecified sexual behavior regarded as immoral.a brief dedicatory sermon against the evils of gomorrahy in these perilous times of moral upset — 1967 •(humorous, rare) The insertion of a non-sexual extremity into a vagina or an anus, for sexual purposes.I heard lectures about the prostate, the joy or males everywhere. I joked: "I may condone Sodomy, but this would be Gomorrahy." — 1981 •(humorous, rare) Failure to maintain infrastructure.gomorrahy may manifest itself so blatantly in the public sphere because it is so well controlled in the private one. — 1986