The 'Fake HTML Tags' meme involves using pseudo-code wrappers like <sarcasm>, <anxiety>, or <reality> to provide a meta-commentary on a specific situation or thought. Popularized within tech circles and developer communities on platforms like Twitter and Reddit, this format uses the logic of web development to define the 'mood' or 'state' of a person. It highlights the overlap between coding culture and everyday life, allowing users to 'program' their emotions or reactions into a visual format that resonates with anyone familiar with basic markup language.