She's feeling blue.
She's sad.
She spilled the beans.
She didn't keep the secret.
They were just horsing around.
They were just playing.
I'm in a pickle!
I'm in trouble!
It's raining cats and dogs.
It's raining super hard.
He's got a short fuse.
He's got a bad temper.
They let the cat out of the bag.
They told somebody the secret.
Don't let it get your goat.
Don't let it bother you.
I'm going in the hole on this.
I'm sacrificing, it's more than I wanted to do.
This place has really gone to the dogs.
This place looks terrible, it's not as good as it used to be.
You've got egg on your face.
You're embarrassed.
That opened a can of worms.
That caused trouble.
That's just sour grapes talking.
They're just saying that because they have a grudge.
We're not out of the woods yet.
We're not out of trouble yet.
That guy is a bad egg.
He's trouble.
They got up on the wrong side of the bed.
They're grumpy/ in a bad mood.
She definitely has skeletons in the closet.
She definitely has dark secrets.
It's not her cup of tea.
It's not her style, she doesn't like that.
That's a load off my shoulders.
I don't have to worry about that anymore.
That knocked my socks off!
That was awesome!
They got cold feet.
They got scared and decided not to do it.
Something is fishy.
Something is suspicious.
He took the bull by the horns.
He took charge.
Oooooh! He's in the doghouse!
Oooooh! He's in big trouble with her!
They saw the writing on the wall.
They could tell what was coming next.