Secessionist, a supporter of the Confederacy during the United States Civil War.(noun)
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Use "secesh" in a sentence
"But the 'secesh' soldier has more than this -- he has the desperation of a traitor in a bad cause, of a fanatic and of a natural savage."
"Wild rumors were running through the camp all day that the 'secesh' had been reinforced, were ten thousand strong, and, with forty pieces of cannon, would attack us that night."
"The people were evidently strongly "secesh," although some of them professed to be glad to see us."