dust off verb 3dust-off noun 2forms 4 verb3 •To remove dust from. •(figurative) To use something after a long time without it.I think it's time to dust off my old golf clubs, now that I'm retired. •(slang) To jilt or desert (a person).Red Sox by the Numbers A “dice girl in a roadside tavern,” she said she shot McNaughton because “he tried to dust me off.” dust-off noun2 •The act of removing dust from something. •A medical helicopter. formsdusted off · dusting off · dusts off · dust-offs