this is a great thread - what fun to read!
Back when F.R.O.G. started appearing in all the local Christian bookstores, my son and I though it was really neat. It stands for F.ully R.ely O.n G.od.
I wanted to use it for my screen name on my first email, but it wasn't long enough. I wanted "5 frogs", but we couldn't start with a number either.
Not long after, my son, who was about 5 or 6 at the time, went to camp, and made me a necklace that had a frog engraved on it, and we5frogs written under it. He had decided that the whole thing meant that "we 5" (the five of us in the home at the time" f.ully r.ely o.n G.od's S.pirit. I love it and it stuck, and I have been using it ever since.