Candy
Something is very easy to do.
a piece of cake
You don’t feel well.
under the weather
Tell a secret.
spill the beans
Something is very expensive.
cost an arm and a leg
You might say this when something costs much more money than you expected.
cost an arm and a leg
You might say this after finishing a test with no difficulty.
a piece of cake
Someone accidentally tells information that was supposed to be private.
spill the beans
You may stay home, rest, and take medicine when you feel this way.
under the weather