It meant "un-cool" or not current with popular fashion and behavior.
Cool IS slang. It means very good or excellent.Some synonyms for cool would be awesome, bitching, beast, or fantabulous.
"Cool" is a slang word! It means popular or faddish.
Cool itself, unless you are using it to mean mildly cold, is a slang word. Just because it is old slang doesn't mean that it is not still slang.
Yes
"Cat" in slang means: female, person or friend. So, "Cool Cat" would just mean a cool person.
This word "Slang" is an abbreviation of "Sick Language" i.e. SLANG. and in slang "Sick" means "Cool".
cool
That depends on how current "current" is...
Genial (cool, slang for a person) - also guay, or chido (Mexican slang)frío (according to temperature) - also fresco (e.g. cool air, cool weather)
It's an older slang with the same meaning as "cool" or "groovy."
Cool.