blue bellies
Preserved but no longer current.
A term applied by the Confederate soldiers during the civil war in America to the Federals, the name being suggested by the skyblue gaberdines worn by the Northern soldiers. On the other hand, the "filthy BLUE BELLIES," as the full title ran, dubbed the Confederates "Greybacks," the epithet cutting both ways, as the Southern soldiers not only wore grey uniforms, but "greyback" is American as well as English for a louse.
Era: ca. 1874 (Victorian)
Sources & notes
Historical definition reproduced from Hotten’s The Slang Dictionary (1874, public domain; Project Gutenberg #42108, retrieved 2026-07-31). Reflects the attitudes of its era.
Common questions
What does “blue bellies” mean?
A term applied by the Confederate soldiers during the civil war in America to the Federals, the name being suggested by the skyblue gaberdines worn by the Northern soldiers. On the other hand, the "filthy BLUE BELLIES," as the full title ran, dubbed the Confederates "Greybacks," the epithet cutting both ways, as the Southern soldiers not only wore grey uniforms, but "greyback" is American as well as English for a louse.
Is “blue bellies” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.