A person who is an ungrateful fuck. Could be a college guy who complains about his mother only making him salad for dinner when he ONLY asks for salad. Or it could be the rich girl who simply rode the wave through life because she got everything handed to her (including daddy's credit card) and is now sitting by the computer twirling her hair while reading this.

A person or people that purposefully causes chaos or mischief within a group for the sake of entertainment.