The phrase comes from Parks and Recreation, where Tom Haverford and Donna Meagle celebrate an annual Treat Yo Self day devoted to spending on clothes, massages, fine food and other small luxuries. The scene became a widely quoted moment as fans reused the line to justify their own indulgences online, and it later spread through reaction videos, memes and short-form clips. Its lasting appeal lies in its simplicity: three words that turn self-care from a guilty pleasure into a shared joke, making it easy to reuse year after year.