Acronym for "Fandom Is A Way Of Life". Often used by fen to describe their level of interest in their particular fandom. Folks following the FIAWOL philosophy get deeply into their fandom, sometimes going to extremes to show their love. (Remember, "fan" is short for "fanatic". :)
If you wear a Starfleet uniform to a court date, you're most likely following the FIAWOL philosophy.
Acronym for "Fandom is Just A Ghod-Damned Hobby". Often used by fen to describe their level of interest in fandom. Folks subscribing to the FIJAGDH philosophy are not as rabid about what they're fans of as the FIAWOL crowd.
Some people like watching Star Trek, but otherwise don't collect memorabilia or dress up in costumes from the show. These fen follow the FIJAGDH philosophy.