fight (your) corner

British

to defend something that you believe in by arguing.

You'll have to be ready to fight your corner if you want them to extend the project.

• kick when down
• kick when they're down
• kick your heels
• kick yourself
• kid around
• kids' stuff
• kill or cure
• kill someone with kindness
• kill the fatted calf
• kill the goose that lays the golden egg
• kill time
• kill two birds with one stone
• kill with kindness
• kind of
• king of the castle
• king's ransom
• kiss and make up
• kiss-and-tell
• kiss and tell
• kiss arse
• kiss ass
• kiss goodbye
• kiss goodbye to
• kiss goodbye to something
• kissing cousin