LGFB Posted in L Best definition LGFB n. Looks Good From Behind. Typically a girl/women who looks amazing from the back. Then you see her face… “Dude, we were following around the hottest girl at the mall, but she was a LGFB” How satisfied are you with the definition? Looking for LGFB meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 9 times.