PootPoot

Poot poot Pootpoot, poot. Poot http://www.wikipedia.com/" class="external">Valley Poot!

If I'm correct, wasn't poot featured in one of Bruce Coville's series, the one where aliens area subverting... that's it, My Teacher's an Alien! That's the series! Is taht where this is from, or did he take it from another source entirely?