A term loosely applied to preteen and young teenage girls who seem to be living half-inside a fantasy world. Symptoms include overuse of makeup (specifically glitter and eyeshadow), taking horse-riding lessons, wearing multiple bracelets and other tacky jewelery, reading medieval romance novels, et cetera. NOT to be confused with goths.
"J.B. put big smudges of purple over her eyes, then rubbed glitter over her cheeks. She's got a serious case of Unicorn Syndrome going on.. I don't think she realizes how stupid she looks."