The lines u mad and you have been trolled come from early internet trolling culture, where posters used them to mock someone who had taken bait or reacted angrily to a joke. Paired with the trollface era of forums, image macros and reaction videos, the phrases became shorthand for a lighthearted gotcha moment rather than a serious insult. They later spread through gaming chats, prank videos and short-form clips, where the short, punchy delivery made them easy to reuse. That simple setup and payoff is why the clip still works as a quick tease today.