An insult most commonly used by "Dinkles," a character imagined during an episode of Game Grumps. (Steam Train, specifically) The meaning of the word is unknown, likely due to it being made up.
Dinkles: "You're such a polynigmion!"
Arin: "What the fuck? I don't even know what that means."
Dinkles: "When you get into Trig. 7, you're gonna be super, SUPER offended!"
Arin: "Whatever, man."