The 'I See What You Did There' meme is a staple of internet culture used to signal that a person has successfully detected a subtle joke, double entendre, or a clever play on words. While its visual representation varies—most famously appearing as a wide-eyed, grinning rage comic character or a squinting face—the phrase itself gained massive popularity on forums like 4chan and Something Awful during the mid-2000s. It functions as a playful 'gotcha' moment, acknowledging that while a joke might have been hidden or niche, it didn't go unnoticed. Even years later, it remains one of the most effective ways to respond to irony and wit across social media platforms like X, Reddit, and Discord.