One who does not follow any particular crowd but is an equal-opportunity critic. A person with a high need for cognition (look it up). Unsheeps are the opposite of sheep. The unsheep theme song is "What the world needs now is no more sheep, no sheep! It's the kind of human that there's just too many of . . ."
"Unsheepable" derives from World of Warcraft's use of the term "sheepable."