The clip behind this upload is not tied to a documented film, show or viral video, so it circulates as a Dutch soundboard insult. The word comes from Dutch street slang, where kanker is used as a harsh intensifier and mongool is an insult, and the combination is meant to sound offensive. Dutch gamers and meme creators adopted it as a reaction sound for fails, roasts and rage moments, and it spread through short clips and soundboards rather than one original source. Its bluntness is the point, which keeps it in use for exaggerated comic outrage.