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