Butter-bar definition

(US Air Force, US Army, US Marines) A 2nd Lieutenant.
noun
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(US Navy, US Coast Guard) An Ensign.
noun
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Other Word Forms

Noun

Singular:
butter-bar
Plural:
butter-bars

Origin of butter-bar

  • Derived from the insignia of an O-1 in the US Military, which consists of a single yellow bar.

    From Wiktionary