The 'Rehehehe' meme, also known as the Scooby-Doo Laugh, stems from the iconic, wheezy giggle produced by the titular character Scooby-Doo in the classic Hanna-Barbera animations. While Scooby often used it as a sign of playful amusement or nervousness, the internet has repurposed the phonetic spelling 'Rehehehe' to represent devious, mischievous, or 'diabolical' behavior that is usually harmless or petty. It gained massive traction on TikTok and Twitter, often paired with videos of people or pets making a face that suggests they've just gotten away with something small. It serves as the perfect visual shorthand for those moments when you’re feeling a little bit sneaky and want to announce your minor victory to the world.