A person who drives carelessly or at excessive speed, or slang for someone who drives a BMW car recklessly.
From German 'bimmeln' (to ring/go fast) or as slang from BMW initials. Primarily British English slang emerging in late 20th century motoring culture.
This is pure slang that shows how car brands become verbs and nouns—just as 'Uber' became 'to Uber,' car enthusiasm creates colorful insults based on what you drive!
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