English Idiom of the Day – Cloud Nine
To be on 'cloud nine' means you are extremely happy or blissful.
Example: For a few days after I heard I'd got the job, I was on cloud nine.
Did you know...? This idiom originates in the fact that weather experts classify cloud nine as a particular type of cloud that is white and fluffy and very high up in the sky. To be up high in the sky is likened to paradise or being happy.
Idiom with similar meaning: To be 'over the moon'