on cloud nine
Proposed by a contributor, not yet supported by evidence.
Where it’s used:
Used
Widespread English
Examples
‘ One moment he's on cloud nine, and now when I tell him all that's gone on he'll feel as though he's been knocked over by a juggernaut.
They just want to stay on cloud nine.
British National Corpus sentence via the MAGPIE corpus (CC BY 4.0, retrieved 2026-07-30)
Sources & notes
Listed in Wiktionary’s “English idioms” category (retrieved 2026-07-29); definition pending editorial review. Figurative class: Metaphor (PIE-English corpus, CC BY 4.0, retrieved 2026-07-31).
Common questions
What does “on cloud nine” mean?
Very happy.
Is “on cloud nine” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.