chicago piano
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
The Thompson submachine gun.
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).
Sense 2
Meaning · English
A 1.1-inch anti-aircraft gun.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 3
Meaning · English
A multiple 2-pounder gun pom pom anti-aircraft gun.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “chicago piano” mean?
The Thompson submachine gun.
Is “chicago piano” formal or informal?
chicago piano is generally slang.