The line comes from Crocodile Dundee, the 1986 Australian comedy film starring Paul Hogan as Mick Dundee, an outback adventurer visiting New York City. In the scene, a mugger threatens him with a small knife, and Dundee answers by drawing a far larger Bowie knife, turning a tense confrontation into a joke about scale. The exchange became one of the film's most quoted moments and later spread through reaction videos, edits and soundboards, where it still works because the setup and payoff are instantly recognisable even without seeing the film.
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Mick Dundee delivers the famous Crocodile Dundee line before revealing his much larger hunting knife. Creators use it for exaggerated one-upmanship moments.
This is the moment Mick Dundee, played by Paul Hogan, calmly dismisses a street mugger's small switchblade with the line that's not a knife, then produces his own enormous hunting knife and delivers the punchline. His voice stays relaxed and dry rather than threatening, which makes the escalation feel funny instead of violent, and the pause before the reveal lets the joke land. The clip runs just over five seconds, long enough to include both the setup and the payoff, so viewers instantly recognise the bluff being called and the much bigger weapon that follows.