The line comes from Frank Zappa's 1974 song Don't Eat the Yellow Snow, the opening part of a longer musical story about Nanook, an Eskimo, and a fur trapper in the Arctic. In the song, the warning is practical advice in a surreal northern setting, delivered with Zappa's characteristic deadpan humour. Decades later, the phrase survived as a standalone joke because it is instantly recognisable and easy to quote out of context. Online creators now reuse the short warning as a shorthand for disgusting surprises, keeping the original absurd logic intact.