Definition
To neglect helping when one’s time is needed most; to ignore the major problem at hand (whilst doing something less important); to be idle, inactive, or uninterested in a time of great need.
Origins
From the ancient rumour that the Roman emperor Nero played a lyre during the Great Fire of Rome (AD 64).
Also Said As
- sit on one's hands
- sit on one's thumbs
See Also
How People Actually Use It
To enjoy minor unimportant things while ignoring the crisis happening right now
"Trump dancing to Sinatra while people rioted was like Nero playing a fiddle while rome burns."
Source: Urban Dictionary