Lol dfo Posted in L Best definition Lol dfo Little old lady done fell out (fainted). In medical triage slang, “lol dfo in 3” means “the little old lady who done fell out (fainted) is being seen and treated in room 3”. How satisfied are you with the definition? Looking for Lol dfo meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 107 times.