shake off

verb

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.”
To dissociate oneself from (an allegation or rumour).
“Dozens of foreigners have been jailed for child sex crimes or deported to face trial in their home countries since Cambodia launched an anti-pedophilia push in 2003, to try to shake off its reputation as a haven for sex predators.”
“The 21st century's spectacular reimagined transport hub "set out to shake off the old image of stations. I think it's successfully done that, and it's great that others are following suit," Spinks continues.”
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.”
To rid oneself of a malady or its symptoms
“I just can't shake off this cold.”