Short taunt sounds like this spread through gaming chats, group messages and meme soundboards because they say a whole reaction in less than a second. The phrase you're mad became a common online comeback for calling out someone who is visibly frustrated, and pairing it with over the top laughter makes the mockery unmistakable even without context. Clips in this style are kept on soundboards for instant playback during live games and streams, and are reused in short edits where timing matters more than explanation.