shake off
verb
Definitions
To remove (something attached to, on or clinging to an object) by shaking.
Example: The archaeologists shook off the dust that had fallen from the roof, and promptly continued their work.
To dissociate oneself from (an allegation or rumour).
Example: Some rumors that the governor had smoked pot as a teenager were flying around, but he has finally managed to shake them off.
To lose someone who is tracking you
Example: The police are chasing us! Quick, turn into that side street! We've got to shake them off.
To rid oneself of a malady or its symptoms
Example: I just can't shake off this cold.