Idioms are phrases that seem to mean one thing but actually mean another, like:
In a pickle
chained purse strings
Tffg
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 doesn't mean anything except the fact that they are speaking their language. All languages have slang and idioms. It means that they are using saying from their dialect.
This is unclear -- do you mean "what are some idioms used in the movie?" Because "inception" is not an idiom. It's an ordinary word.
Get ahead of the pack. the Early bird gets the worm.
it mean that something spread very fast
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.