What is cloud 9 meaning?

Cloud 9 is a colloquial expression that means feeling extremely happy, on top of the world, or in a state of euphoria. It is often used to describe someone who is experiencing intense joy, satisfaction, or pleasure. The phrase is derived from the idea of being so happy that one feels as though they are floating on cloud nine, a metaphorical representation of ultimate happiness. It is commonly used in casual conversation to convey a sense of extreme positivity and contentment.