What is Blue Coats?
1.
A usually-derogatory term for people from "up north". This refers to the Union soldiers during the American
White Trash person on the porch in northern Alabama: "Hey, do y'all see thuh blue coats cummin' in thur Leen-cun towncawr down from Ohah-yuh? (Ohio)"
2.
A term used to describe the cops.
Yo, dun, Shorty just got snatched up by the blue coats!
See