No diabeto belongs to the long-running family of memes built around mispronouncing diabetes, a joke that grew out of Wilford Brimley's famously earnest diabetes awareness commercials from the 2000s. Clips of Brimley saying the word went viral on YouTube and Vine, and imitators began exaggerating the pronunciation into forms like "diabeetus" and "diabeto." The phrase took off as a reaction sound on soundboards and social video apps, where creators use it to mock junk-food binges or mock-serious health warnings. Its staying power comes from being short, instantly quotable, and easy to lip-sync.