Playing a violin, or wasting time on small, unimportant tasks instead of doing what really matters.
From Middle English 'fithele' (violin), possibly from Old English 'fitela.' The meaning shifted from literally playing violin to wasting time because fiddling around with a violin was seen as unproductive.
Nero supposedly 'fiddled while Rome burned'—but historians say this was propaganda! The phrase has stuck for centuries as the ultimate symbol of doing nothing while disaster happens around you.
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