To refuse to acknowledge a known truth
Turn a blind eye
To feel ill
Feeling under the weather
To circle the point; to avoid the point
Beat around the bush
To reprimand someone for behaving badly, with the intention of improving that person’s behavior
Read the riot act
To leak a secret
Spill the beans
There is evidence to back up a previously made claim, specifically evidence intrinsic to the object in question. (Example: Of course this project will be successful, the proof is in the pudding.)
The proof is in the pudding
Secured success
Got it in the bag
It’s up to you
The ball is in your court
To wish someone luck
Break a leg
To play a practical joke
Pull someone’s leg
To be undecided
Sat on the fence
To be loyal no matter what
Through thick and thin
Rarely
Once in a blue moon
It’s really, really good
It’s the best thing since sliced bread
Don’t take it too seriously
Take it with a pinch of salt
No matter what
Come rain or shine
To fail spectacularly
Go down in flames
That’s true
You can say that again
To agree completely
See eye to eye
Following a trend
Jump on the bandwagon
Perfect
As right as rain
Go to bed
Hit the sack
It’s too late
Miss the boat
Just barely
By the skin of your teeth