The line comes from Kindergarten Cop, the 1990 comedy starring Arnold Schwarzenegger as detective John Kimble, who shouts 'It's not a tumor!' in a hospital scene. Schwarzenegger's Austrian accent turns 'tumor' into 'toomah', and that mispronunciation became the joke's engine. Long after the film left cinemas, the quote lived on through soundboards, YouTube poops and reaction memes, where it answers any exaggerated panic. Today it circulates widely on TikTok and meme pages as a short downloadable clip, shorthand for dismissing drama with total false confidence.