The 'Mommy? What Is It Caillou?' meme originates from parodies of the Canadian educational children's show, Caillou. While the original show is known for its mild-mannered lessons, internet culture transformed it into a vehicle for dark humor and surrealism. The specific format typically involves Caillou asking his mother a question, only for her to respond in a deep, distorted, or surprisingly aggressive tone. This trend gained massive traction on platforms like TikTok and YouTube through voice-over edits that subvert the wholesome nature of the original animation. It is commonly used to highlight awkward realizations, existential dread, or simply to shock viewers with unexpected dialogue.