Squee: An exclamation or interjection of excited happiness or surprise; a squeal of glee. May also be used as an intransitive verb, e.g.: "Omigod, when I saw Legally Blonde: The Musical I started squeeing before the curtain went up!"
Squee is also a fictional character in a series of comic books created by Jhonen Vasquez. The books are collected in a single volume, Squee's Wonderful Big Giant Book of Unspeakable Horrors.