An exclamation expressing annoyance, defiance, or to get attention; common in British and Australian English.
Origins uncertain; possibly imitative in nature or shortened from expressions like 'dur-duh.' Gained popularity in late 20th-century youth and internet culture.
Modern internet culture revived 'dur' and 'dur-brain' as slang—it's fascinating how meaningless sounds can become recognized expressions that millions of people instantly understand!
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