shake off

verb4

1. •
   To remove (something attached to, on or clinging to an object) by shaking.

   • The archaeologists shook off the dust that had fallen from the roof, and promptly continued their work.
2. •
   To dissociate oneself from (an allegation or rumour).
3. •
   To rid oneself of a malady or its symptoms

   • I just can't shake off this cold.
4. •
   To lose someone who is tracking you.

   • The police are chasing us! Quick, turn into that side street! We've got to shake them off.