It's a ... of cake.(its easy)
It's a piece of cake.
It's a slice of cake.
Let's ... the knot. (get married, have a wedding ceremony)
Let's cut the knot.
Let's tie the knot.
Feeling ... the weather. (feeling sick, unwell)
Feeling under the weather.
Feeling on top of the weather.
At the ... of a hat.(to happen instantly)
At the toss of a hat.
At the drop of a hat.
The best thing since ... bread.(to show enthusiasm about something)
The best thing since banana bread.
The best thing since sliced bread.
As ... as a rock. (something that is extremely strong, firm, stable, and reliable)
As solid as a rock.
As small as a rock
... the hook. (out of trouble)
Off the hook.
Stuck on the hook.
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.
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.
... your tongue.(keep your mouth shut on purpose)
Bite your tongue.
Cut your tongue.
Cross that ... when you come to it. (don't worry about something until if happens)
Cross that bridge when you come to it.
Cross that book when you come to it.
It's a ... in disguise. (something bad that has good results)
It's a bee in disguise.
It's a blessing in disguise.
On the .... (undecided or uncertain)
On the fence.
On the road.
Curiosity ... the cat. (being curious can be dangerous and get you into trouble)
Curiosity jumped the cat.
Curiosity killed the cat.
Let ... dogs lie. (keep out of the situation, don't interfere with the problem)
Let sleeping dogs lie.
Let sleeping dogs lie.
I ... a rat. (a feeling of suspicion, not trusting ones actions)
I smell a rat.
I chase a rat.
Burn the ... oil. (to work or study late into the night)
Burn the house oil.
Burn the midnight oil.
Take it with a ... of salt.(don't always believe something is true, use caution)
Take it with a pile of salt.
Take it with a grain of salt.
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.
... on the bandwagon.(to follow a trend)
Ski on the bandwagon.
Jump on the bandwagon.
It's a ... in the bucket. (a very small amount compared with what was expected)
It's a drop in the bucket.
It's a stick in the bucket.
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.
The ball is in your .... (Your turn to take action of a situation)
The ball is in your court.
The ball is in your mouth.
Once in a ... moon.(not very often, very rarely)
Once in a black moon.
Once in a blue moon.
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.
It's the ... of both worlds.(to get advantages of two separate situations)
It's the best of both worlds.
It's the opposite of both worlds.
Don't put all your eggs in one .... (put all your efforts in one thing)
Don't put all your eggs in one refrigerator.
Don't put all your eggs in one basket.