Possibly the worst insult there is. I am most likely breaking the law by writing this definition. Please only use this insult in a very serious conversation, as anyone who is easily offended will get you punished.
"God, Karen is an actual meaniepants"
"Uh.. You do realize what you just said, right?"
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.