The 'Diet Coke. You're On.' meme originated from a 2014 marketing campaign that was intended to associate the drink with success and confidence. However, the internet immediately poked fun at the slogan because 'You're on Coke' is common slang for being under the influence of cocaine. The campaign featured celebrities like Taylor Swift, but the posters and billboards were widely mocked on social media for their tone-deaf double entendre. Today, the meme is frequently used to highlight awkward corporate mistakes or as a reaction to someone acting with suspicious levels of intensity and energy.