The line comes from the Doctor Who finale Doomsday in 2006, spoken by a Dalek to the Cybermen when they suggest joining forces against humanity. The Daleks reject the offer outright, treating millions of Cybermen as a minor infestation rather than an equal army. Clips of the exchange circulated on forums and video sites as Doctor Who memes grew, and the single sentence was later isolated for soundboards. It remains popular because it captures pure, arrogant dismissal in a few seconds that still works far outside its original science fiction context.