It's raining cats and dogs.
It's raining heavily or a lot.
couch potato
someone who is lazy and spends their time sitting around
Let's cut to the chase.
To get to the main point in a conversation or topic
You look like a million bucks!
You look great!
Break a leg!
Good luck!
This is a piece of cake.
Something is easy.
Hold your horses!
Calm down or slow down.
Don't cry over spilled milk.
Don't cry over something small.
Take a chill pill.
Relax.
feeling under the weather
feeling sick or unwell