The 'Is That Porn?' meme primarily functions as a reaction image used to express suspicion or mock curiosity when someone is viewing something potentially suggestive. It often features a character leaning in with a squinted or intense expression, paired with the blunt question. While several variations exist across different media—including anime captures and redraws—the core sentiment remains a playful or accusatory 'gotcha' moment. It has become a staple in group chats and Discord servers to lightheartedly interrogate what a user is sharing, often leading to subverted expectations where the 'porn' is actually something mundane like a complex spreadsheet, a niche hobby, or a low-resolution video game.