A corruption of juste-au-corps. Compare justico.(noun)
The Century Dictionary (Public Domain)
Use "jeistiecor" in a sentence
"` ` Ou, a jeistiecor --- that's a jacket like your ain, there."
"Then raising his head, as if to see who spoke to him, he touched his Scotch bonnet with an air of respect, as he observed, “Eh, gude safe us! — it’s a sight for sair een, to see a gold-laced jeistiecor in the Ha’garden sae late at e’en.”"
"a sight for sair een, to see a gold-laced jeistiecor in the Ha'garden sae late at e'en. ''"