Plotbunny is very common with groups focused on original writings. The group I know talks about them all the time. Some of them even have stuffed bunnies that are labeled Plotbunny.

They also talk about their muse a lot, often in terms of trying to drag the drunken sod back from wherever he/she has run off to, to make them get back to work.

Although a lot of my original fics come from AU fanfic ideas. Eventually I decide, "Screw it, this is too weird. Original!" Sometimes it's even a not-so-implausible fanfiction idea, and I wind up with something I have to tweak heavily to avoid uncomfortable association with canon. (Or at least, a really common fanfiction idea. There's this one fandom I've written for in which a ghost character is consistently resurrected. I did that, but wound up using an OC, so I switched his history around and made it original. I'm rambling now; I think I'll stop.)

Why else would I have asked? ^_^
I'm thinking pile of Sue corpses, Agents panicking, no idea how to get rid of them, have completely forgotten about un-neuralysed Homunculi, suddenly hear from behind them "I'm hungry..."
Hmm, we don't know if he likes the taste of glitter or not. That could be a problem.