Scooby has a speech impediment and tends to pronounce most words as if they begin with an "R", though most characters are able to understand him perfectly. In most iterations, he keeps his sentences relatively short, usually using charades for anything longer than three or four words. His catchphrase, usually howled at the end of every production, is "Scooby-Dooby-Doo!" or "Rooby-Rooby-Roo".