The exact speaker and original recording source are not reliably documented. The phrase combines the English words “just prank” with the Indonesian expression “kok marah,” which asks why someone is angry. It circulates as a short reaction audio for prank clips, chat edits, and videos where a joke receives an unexpectedly serious response. Its continued appeal comes from the contrast between a mischievous act and the speaker’s casual attempt to dismiss the consequences, making it useful for both genuine prank footage and staged comedy.