English Idioms: Happiness
1. Having a whale of time: to enjoy yourself very much
E. g. We had a whale of a time on holiday.
2. On cloud nine: extremely happy
E. g. I was on cloud nine once I had completed it.
3. Tickled pink: delighted
E. g. I was tickled pink when I got his autograph.
4. On top of the world: happy and elated.
E. g. He was interested in her and she felt on top of the world.
5. Happy as a clam: extremely happy
E. g. Although the job does not pay very well, she is as happy as a clam there.
6. Buzzing: really happy about something.
E. g. I'm buzzing for Sam's party on Friday!
7. Over the moon: extremely happy; delighted.
E. g. They're going on holiday on Wednesday so they're all over the moon.
8. In seventh heaven: very happy; ecstatic.
E. g. He was in seventh heaven, so excited.