be on cloud nine

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be on cloud nine

To be in a state of extreme happiness. Ever since Mary got her promotion at work, she's been on cloud nine. I don't think I've ever seen her happier!
See also: cloud, nine, on
References in periodicals archive ?
"I am on cloud nine. I didn't think it would happen but the manager has made it happen and hopefully I can reward him."
WHY do we use the phrase "I am on cloud nine" to say we are feeling really happy?