Show Ruiner: (Noun) Someone who causes a quality destruction to a television show.

Poor Britney. Even though everyone's been telling her she done good with her guest appearance on "How I Met Your Mother," star Neil Patrick Harris is now saying that she's a show ruiner and doesn't ever want her back, not in a billion-dey years.

''I'm in the minority that our show does not need stunt casting in order to succeed,'' Harris declared during a break from taping the Monday night CBS sitcom, which has grown a cult following since its 2005 debut. ''I worry that if they start 'Will and Grace'-ing us too much, that the show will suffer. And we're all really proud of the content of the show. I mean, viewership is not our game. It's the network and the studio's game, you know. It's the promotion department's game,'' the actor, who plays womanizer Barney, told The Associated Press in an interview last week. (Source)

Pffft. Ratings schmatings. Whatever, that's some other jerk's problem to deal with, right? In related news, word is coming in that Neil Patrick Harris has just been replaced on "How I Met Your Mother," and the character of Barney will now be played by Britney Spears. Congratulations, Britney!