coo
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Cool.
Register: slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “coo” mean?
Cool.
Is “coo” formal or informal?
coo is generally slang.