butter bar
Proposed by a contributor, not yet supported by evidence.
Sense 1
Meaning · English
A second lieutenant.
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
An ensign.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “butter bar” mean?
A second lieutenant.
Is “butter bar” formal or informal?
butter bar is generally slang.