The Dunkin' Donuts Customer Rant meme stems from a series of viral social media clips where customers film themselves passionately complaining about service issues or menu changes at the popular coffee chain. These videos often go viral for their high energy and hyper-specific complaints, ranging from the amount of ice in a latte to the availability of seasonal flavors. As a meme template, it is used to satirize 'Karen' behavior or to authentically vent about the relatable tragedy of a ruined morning coffee. It captures the frantic energy of someone who hasn't had their caffeine yet, making it a favorite for internet users to describe any situation where they feel unheard or slightly inconvenienced.