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.
to support
Unrealistic, immature.
She was full of an emotion.
The idiomatic expression "let the cat out of the bag" means to reveal a secret or disclose information that was meant to be kept confidential. It often refers to an accidental or unintentional disclosure, where someone shares something they weren't supposed to. The origin of the phrase is somewhat uncertain, but it is commonly used to highlight the act of unintentionally exposing hidden details.
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
Listening with interest.
"To be taken in" means to be tricked or fooled.