fought very hard or fiercely for something
They fought tooth and nail to protect their rights.
to reduce effort, pressure or intensity
You should ease up on work before you burn out.
to think carefully about something
I need time to mull over your proposal.
feeling completely well and healthy
I was feeling unwell last week but now I'm as right as rain. How are you?
https://www.facebook.com/BritishEnglishLikeaNative/videos/3517020728332057/?t=16
A few days of rest and you'll be right as rain.
to discuss work or business, even in social settings
They always talk shop at family dinners.