The most common idiom about cats is "Curiosity killed the cat."
A cat has nine lives.
It's raining cats and dogs.
There are many idioms and phrases for 'on the back burner'. Some idioms and phrases for 'on the back burner' include 'pushing aside' and 'procrastinating'.
"Idioms for Being Afraid", "Idioms for Being Angry", "Idioms for Being Happy" are some examples of idioms found in the book "Found" by Margaret Peterson Haddix.
"It's raining cats and dogs outside, so bring an umbrella." "She's on cloud nine after receiving a promotion at work." "Don't count your chickens before they hatch, wait until the deal is finalized." These examples demonstrate the use of idioms in a sentence.
Some websites that have idioms written in them include The Free Dictionary, Cambridge Dictionary, and Phrases.com. These sites provide definitions and examples of idioms to help users understand their meanings and usage in context.
Here is a link to some idioms. You can pick the "non-common" ones for yourself -- some people have heard certain idioms a lot and others have not heard the same ones, so you'll need to decide that part.
savvy, brainy
Each of those idioms is already a sentence.
The best place is to go on your search engine and type in "list idioms" You can also look at this question for some examples.
Some examples of idioms in "Divergent" include "jumping off the deep end," "barking up the wrong tree," and "walking on eggshells." These idioms are used to convey deeper meanings or emotions within the story.
cry unclemonkey's uncle
In a pickle