The "Duh" meme features a sarcastic response to an obvious statement or question. Typically, it includes an image of someone making a face that conveys the sentiment, often paired with captions like "No, really?" or "You don't say?" It originated from the 1990s and has seen various iterations on social media platforms. Users employ the meme to mockingly highlight the redundancy or simplicity of certain remarks. Its popularity stems from its versatility and the universal appeal of humor rooted in sarcasm. The "Duh" meme continues to be a go-to for online humor.