Some terms you should know:
Sticker Hunter - someone who plays the game within the game at GetGlue and tries to amass as many stickers as they possibly can. If you're reading this blog, you probably qualify!*
Stick-Tease - the act of GetGlue hinting at the availability of a sticker and then not making it available. (See Jonah Hex, Sex & The City 2, Jack Sparrow, and Don't Steal Me Stickers)
Sticker Blue-Balls - the condition of having met the requirements for earning a sticker but not receiving it. Typically seen on the days that a lot of stickers are released as the server glitches start cropping up.*
Gluebie - someone who is new to GetGlue (and typically doesn't have a lot of stickers or is missing show premiere stickers.)*
Gluser - a creepy stalker-type who replies to your comments or check-ins and won't leave you alone. Typically ends up on your block list in short order.*
Parroting - the act of checking-in to a topic with the same phrase everyone else is using, without knowing whether or not it will work, in the hopes that a sticker will pop.
Phrase Sticker - a sticker that requires you to check-in with a special keyword or phrase to get it to pop.
(*Thanks to Flint for the majority of these!)