Leave Frack, and Felgarcarb in its totally rules! I love it Kevin! It cracks me up!Yeah, there's a filter on some words that I put in long time ago just to have a little fun. I think I must've been watching too much BSG classic at the time since "felgercarb" is from the original series (the "re-imagined" reboot used "frack"). Just checked... there are 5 replacement words defined, two get replaced with "felgercarb", one gets replaced with "frack", one gets replaced with "frackin" and the final one gets replaced with "gorram" (from Firefly).
To date I think you and @Tom are the only people who have noticed.