"Death by snu snu" comes from the animated TV series Futurama, where the phrase became one of the show's most quoted jokes. Over time, the line spread far beyond the episode through memes, reaction videos, and short-form edits. It stays popular because the wording is instantly recognizable and easy to apply to exaggerated attraction, especially in fandom, anime, and gaming posts. The phrase now works as a shorthand reaction whenever desire and obvious danger are played for laughs.