Noun: a self-identified expert on memes, and always knows when to use the right one in theoretically every situation. They are often seen in their natural habitat, the Internet, viciously pointing out when a Plebian incorrectly uses a meme.
"You used the wrong meme, you fucking idiot. Trust me, I'm a memeotologist."
"As a memeotologist, I would say this moment calls for a Scumbag Stacey. You're such a bitch."