Over the moon.
This something of a cliché but at least this means it is in common usage. There is a fair chance that it originates from a ‘nonsense poem’ written by one of England’s most eccentric Victorian writers, Edward Lear.
Hey diddle, diddle
The cat and the fiddle
The cow jumped over the moon
The little dog laughed
To see such a thing
And the dish ran away with the spoon
These days, its use is much more ordinary and used to express great joy.
How do you feel about winning the league title?
Absolutely over the moon!
