[on cloud nine] {adj. phr.}, {slang}
~быть на седьмом небе от счастья.
О большем и не мечтать; быть очень счастливым.
* /Ada has been on cloud nine since the magazine printed the story she wrote./* /We were on cloud nine when our team won the state championship./
Ср.: ON TOP OF THE WORLD, WALK ON AIR.