The Burger King Foot Lettuce meme originated from a viral 2018 video by YouTuber Chills (Top15s), who narrated a story about a 4chan user posting a photo of themselves standing in lettuce bins at a Burger King restaurant. The meme's popularity stems primarily from Chills' incredibly distinct, monotone, and rhythmic delivery of the opening line: 'Number 15: Burger King foot lettuce. The last thing you'd want in your Burger King burger is someone's foot fungus.' It quickly transformed into a widespread copypasta, with internet users remixing the audio or using the 'Number 15' format to announce absurd or mundane situations in that specific dramatic cadence.