fight tooth and nail

Meaning

1. to fight in a very determined way for what you want

   The residents are fighting tooth and nail to stop the new development.

From the same entry

• fight your corner
• fight fire with fire
• fight for life
• a fighting chance
• fighting fit
• fighting spirit
• fighting talk
• fight a losing battle
• fight your own battles
• fight shy of doing
• fight to the death
• live to fight another day