Significado de "Dust it off"

O que significa "Dust it off"? É uma expressão?

Exemplo:

"Every cowardly thing that you've done. That I've done. Dust it off." (Música The Do)
Look at that vase. Dust it off and put it on the shelf.

LiveInTheWorld(AndStillBeHappy), se você lê e entende inglês, veja abaixo os sentidos de "dust (it) off":

1 to get something ready to use that you have not used for a long time
I’m dusting off my old skills and returning to work.
Synonyms and related words
To use something, or to be used:repurpose, upcycle, go towards...
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2 to wipe dust or dirt off the surface of something
Would you dust off the shelves?
Synonyms and related words
To make things cleaner or tidier:clean up, clear out, clean...
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3dust yourself off to wipe dust or dirt off your clothes
Synonyms and related words
To make things cleaner or tidier:clean up, clear out, clean...

Fonte: http://www.macmillandictionary.com/dict ... h/dust-off

Look at that vase. Dust it off and put it on the shelf.
Olhe para esse vaso. Passe um espanador e coloque na estante.

Dust off no sentido figurado, pode significar. Reorganizar algo, dar uma arrumada, deixar em bom estado de novo.