The Uno Reverse Card meme stems from the popular Mattel card game, where the 'Reverse' card literally changes the direction of play. In internet culture, the card has transcended the game to become the ultimate "No U" comeback, used to deflect insults or turn a situation back on an opponent. It first gained significant traction on platforms like Reddit and Twitter around 2018 as a visual shorthand for an unbeatable retort. The meme is frequently used in image macros where someone is being criticized, only to present the card as a metaphorical shield that reflects the criticism back to the sender, making it a staple of online banter and irony.