The act of a standing 69 in which you also penetrate the anal sphincter by giving the "two thumbs down" rating. This may be given in the event of a poor effort regarding the lower half of the standing 69. Or straight boredom. Also can be referred to as simply "The Ebert". Patent pending on the "Ebert and Roper".
Brought the spinner home from the bar. She had the oral ability of a teething todler. In response to her lack of skill during our standing 69 session, I decided to rate her performance by giving the "two thumbs down" rating, thus invoking the Roger Ebert.
When you ask somebody to try their own hand at something before criticizing your efforts, you have violated Ebert's Law and lost the argument. Roger Ebert is not a filmmaker, but he knows what he likes and doesn't, and has every right to say so. Similarly, people don't need to be chefs to recognize a good restaurant, or musicians to appreciate a symphony.
Person 1: Your story is rubbish!
Person 2: I bet you couldn't do better!
Students, I don't want to hear any more complaining about the term papers. You've had all semester to do this and the assignment has not changed. It's not like I'm asking you to teach Roger Ebert to yodel.