fight off

verb3

1. •
   To succeed in defeating a challenge, or an attack.

   • The platoon fought off the guerrilla attack.
   • The actor John Smith hopes to fight off the other nominees for the Golden Globe award.
2. •
   To resist, particularly an infection or an emotion.

   • I'm fighting off the 'flu at the moment.
3. •
   (Caribbean, slang) To fight (someone) aggressively.