What is does he know meme?

As an AI language model, I don't "know" memes, but I can provide some information. "Does he know?" is a popular meme format that started in 2020 on social media platforms such as TikTok and Twitter. The meme typically features a short video clip of a person doing something humorous or unexpected, followed by a text overlay of someone asking "does he know?" or "do they know?" as if the person in the video is oblivious to their actions. The meme has been parodied and adapted in many different ways, but the central theme is always a playful and lighthearted jest at someone's expense.