1. To clear something off of something with a quick brushing movement. A noun or pronoun can be used between "sweep" and "off." Don't eat in here anymore, OK? I hate having to sweep all these crumbs off of the bed. He came out of the attic and spent the next 10 minutes sweeping dust off of his clothes. She swept dirt and debris off of the ancient tombstone so she could decipher the inscriptions.

2. To clear, drive, or convey someone or something off (of something or some place) with quick, powerful, and relentless force. A noun or pronoun is used between "sweep" and "off." A huge wave swept dozens of people off of the bridge and carried them out to sea. Hurricane-force winds have been sweeping cars right off of the street.