I just figured it out--all of this time, I've been wondering if there's some weird definition of "gris" that I don't know about, other than when it's used in the context of "gris-gris." You see, people keep ending up at this blog via the google, where, as I believe I've mentioned, they type in weird-ass things like "big ass gris," "gris porn," and "gris on my body."
They're not trying to type gris. They're trying to type girls and are just terrible typists. (They probably don't blog much.)
Maybe this occurred to everyone else a long time ago, but I just got that. Duh.