It's the ... of both worlds.
It's the best of both worlds.
It's a ... of cake.
It's a piece of cake.
The ball is in your ....
The ball is in your court.
Take it with a ... of salt.
Take it with a grain of salt.
It's a ... in disguise.
It's a blessing in disguise.
Once in a ... moon.
Once in a blue moon.
As ... as a rock.
As solid as a rock.
I'll be glad to see the ... of him.
I'll be glad to see the back of him.
Every cloud has a ... lining.
Every cloud has a silver lining.
Curiosity ... the cat.
Curiosity killed the cat.
I ... a rat.
I smell a rat.
It's a ... in the bucket.
It's a drop in the bucket.
Burn the ... oil.
Burn the midnight oil.
... on the bandwagon.
Jump on the bandwagon.
... the hatchet.
Bury the hatchet.
Let's ... the knot.
Let's tie the knot.
Close, but no ....
Close, but no cigar.
Sit on the ....
Sit on the fence.
Kill ... birds with one stone.
Kill two birds with one stone.
Don't put all your eggs in one ....
Don't put all your eggs in one basket.
Cross that ... when you come to it.
Cross that bridge when you come to it.
The best thing since ... bread.
The best thing since sliced bread.
... the hook.
Off the hook.
A leopard can't ... its spots.
A leopard can't change its spots.
She's a ... horse.
She's a dark horse.
Bite off more than you can ....
Bite off more than you can chew.
Let ... dogs lie.
Let sleeping dogs lie.
At the ... of a hat.
At the drop of a hat.
... your tongue.
Bite your tongue.
Feeling ... the weather.
Feeling under the weather.
Actions ... louder than words.
Actions speak louder than words.
You're ... up the wrong tree.
You're barking up the wrong tree.