dust something ↔ off phrasal verb ( see also ↑ dust )
1 . to remove something such as dust or dirt from your clothes by brushing them with your hands:
They were dusting off leaves and twigs.
dust yourself off
He got to his feet and dusted himself off.
2 . to get something ready in order to use it again, after not using it for a long time:
The government is dusting off schemes for supporting creative industries.