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.
Get ahead of the pack. the Early bird gets the worm.
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.
it mean that something spread very fast
Here are some idioms that mean "to notify someone"to let them knowto give them the low-downto give them the skinnyto spill the beans (means to tell something you are not supposed to tell)to let the cat out of the bag (same as "spill the beans")
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.