The clip comes from South Park, the animated comedy that began in 1997, where elementary school counselor Mr. Mackey repeats his anti-drug lecture in almost every appearance. Voiced by co-creator Trey Parker, the character became known for ending sentences with 'mkay' as a nervous verbal tic. Online, the short line was lifted from episodes and shared as a standalone reaction, used whenever someone needs a mock-serious warning that everyone recognizes but nobody actually fears.