What's the corresponding idiom to ...?
"something is quite easy"
It's a piece of cake.
________ a leg
break
to be/feel under the weather
i.e.: She was feeling a little under the weather because of the break-up.
We see eye to eye.
We agree.
"it's raining hard"
It's raining cats and dogs.
________ corners
cut
to have your head in the clouds
i.e.: Guys, sorry, but today I really have my head in the clouds, so I'd better head home, since I clearly won't be of any help.
Out of the frying pan and into the fire.
Things are going from bad to worse.
"don't be so critical"
cut some slack
________ your ________ together
get - act
to cost an arm and a leg
i.e.: Son, I'm not buying you that new cellphone, it costs an arm and a leg!
Let the cat out of the bag.
Give away a secret.
"to argue the opposite, just for the sake of argument"
that's the last ________
straw
to bark up the wrong tree
i.e.: You're barking up the wrong tree, officer. I was at home the night of the murder.
He has bigger fish to fry.
He has bigger things to take care of than what we are talking about now.
"you're better off not knowing"
Ignorance is a bliss.
call it ________ ________
a - day
to take a rain check
i.e.: I'll have to take a rain check on that one, my son has just been taken to the hospital.
There are other fish in the sea
It's ok to miss this opportunity. Others will arise.