OMFGAYFS Share definition Flag An acrynom for Oh my f***ing god are you f***ing serious? Person 1: She had sex with him. Person 2: OMFGAYFS Person 1: ...yeah... Person 2: =o OMFGAYFS by Mrs.JosephJonas August 2, 2008 0 0 Get merch Get the OMFGAYFS mug. Buy Now — $32.95 See more merch