LUIAF Posted in L Best definition LUIAF Acronym for “Laughed Until I Accidentally Farted”. Pronounced as if with a heavy French accent Person 1: “…and the name for his wifi was ‘Bill Wi the science Fi” Person 2: LUIAF! How satisfied are you with the definition? Looking for LUIAF meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 114 times.