a mental condition that occurs at periods of great excitement while watching the show "Glee"; the afflicted is easily pissed off when bothered or spoken to during these periods of time, and all those doing the bothering/talking are at risk of being flipped-out on.
SIGNS OF GleeMS: twitching, not breathing/blinking/, talking to the screen/themselves, eyes are often glued to the screen in suspense
"AAGH!! WILL YOU SHUT-UP!? WILL AND EMMA ARE ABOUT TO KISS, GAWD!! GET A FREAKING AND LEAVE ME ALONE ALREADY!!"
"Oh, sorry, I'll remember not to bother you when you're GleeMSing."