Once in a ... moon.(not very often, very rarely)
Once in a blue moon.
Once in a black moon.
It's a ... in disguise. (something bad that has good results)
It's a bee in disguise.
It's a blessing in disguise.
Kill ... birds with one stone.(to solve to goals in a single effort)
Kill two birds with one stone.
Kill small birds with one stone.
It's a ... of cake.(its easy)
It's a slice of cake.
It's a piece of cake.
As ... as a rock. (something that is extremely strong, firm, stable, and reliable)
As small as a rock
As solid as a rock.
... the hook. (out of trouble)
Stuck on the hook.
Off the hook.
The ball is in your .... (Your turn to take action of a situation)
The ball is in your mouth.
The ball is in your court.
You're ... up the wrong tree. (being misguided , to lead in the wrong direction)
You're smelling up the wrong tree.
You're barking up the wrong tree.
Every cloud has a ... lining. (difficult or sad times often have a happy side to them)
Every cloud has a silver lining.
Every cloud has an invisible lining.
Burn the ... oil. (to work or study late into the night)
Burn the house oil.
Burn the midnight oil.
Actions ... louder than words.(what a person does is sometimes more important that what they say)
Actions speak louder than words.
Actions yell louder than words.
Let's ... the knot. (get married, have a wedding ceremony)
Let's tie the knot.
Let's cut the knot.
... on the bandwagon.(to follow a trend)
Ski on the bandwagon.
Jump on the bandwagon.
Feeling ... the weather. (feeling sick, unwell)
Feeling under the weather.
Feeling on top of the weather.
The best thing since ... bread.(to show enthusiasm about something)
The best thing since sliced bread.
The best thing since banana bread.
I ... a rat. (a feeling of suspicion, not trusting ones actions)
I chase a rat.
I smell a rat.
Cross that ... when you come to it. (don't worry about something until if happens)
Cross that book when you come to it.
Cross that bridge when you come to it.
Let ... dogs lie. (keep out of the situation, don't interfere with the problem)
Let sleeping dogs lie.
Let sleeping dogs lie.
Take it with a ... of salt.(don't always believe something is true, use caution)
Take it with a grain of salt.
Take it with a pile of salt.
Don't put all your eggs in one .... (put all your efforts in one thing)
Don't put all your eggs in one basket.
Don't put all your eggs in one refrigerator.
At the ... of a hat.(to happen instantly)
At the toss of a hat.
At the drop of a hat.
It's the ... of both worlds.(to get advantages of two separate situations)
It's the opposite of both worlds.
It's the best of both worlds.
On the .... (undecided or uncertain)
On the road.
On the fence.
Curiosity ... the cat. (being curious can be dangerous and get you into trouble)
Curiosity killed the cat.
Curiosity jumped the cat.
... your tongue.(keep your mouth shut on purpose)
Bite your tongue.
Cut your tongue.
Bite off more than you can .... (To take on more responsibility than you can handle)
Bite off more than you can chew.
Bite of more than you can watch.
It's a ... in the bucket. (a very small amount compared with what was expected)
It's a stick in the bucket.
It's a drop in the bucket.