You're Know You Are

Josh of Comics Curmudgeon spotted a great example of grammatical nonsense in the wild. The Pluggers panel at the bottom of the page starts with "You're know you are really a plugger..." It's easy to see how this came about: Originally, it was "You're a plugger if" and then the writer thought about "You know you are" and no one caught the problem.

The panel's been fixed on the website, favoring the stilted "You know you are" construction instead of the shorter, but more informal, "You're a plugger if".