A calm mellow cat.
Since you posted in idioms, I assume you mean the slang to describe a person. It means someone is hip, with-it, etc. Mostly used in jazz type clubs.
You could say "curiosity killed the cat," meaning that it's not wise to be too curious.
cool cat
"You" is not an idiom. It is a pronoun.
Sid is not a cool cat. this is coming from the secondary cool cat herself.
Unrealistic, immature.
to support
She was full of an emotion.
The cast of Cool Cat in the Hollywood Parade - 2012 includes: Cool Cat as Cool Cat Anita Marie Curran as Cool Cat Girl Derek Savage as Derek
Idiomatic Expressions are sayings that are commonly used but their meanings cannot be determined by the individual words in the saying itself. Below you will find an alphabetical list of idiomatic expressions
"To be taken in" means to be tricked or fooled.
Listening with interest.
pleasant and easy....