Term used by Mid-Atlantic state locals to describe a Northerner (aka "Yankee") who moves to Florida to escape the cold winters; only to find it is too hot and moves half way back up the coast to the mid Atlantic states (NC, SC, VA). Typically used in a derogitory manner as is Yankee in many parts of the South.
Wife: Joe and Marge just moved into the neighborhood. They used to live in New Jersey, but moved here from Florida.
Husband: Damn half backs, why don't they stay up North in the first place.
American Northerners (Yankees to Southerners) who move to the South, particularly Florida, who decide they can't stand the heat and humidity or hurricanes, and end up moving only half way back home, as in Tennessee, Georgia, SC, etc.
"This used to be a nice town, but it's being ruined by all the damn half-backs!"