Benajah Scott died intestate in 1856. His son David A. Scott was appointed administrator of an estate that included seven enslaved people — Will, Lucinda, Tempy, Maria, Chaney, Kedar, and Gideon. In late December 1856, David Scott arranged for Chaney, Lucinda, Tempy, and Will to be hired out for a year to kin and neighbors. Maria, Kedar, and Gideon (described as “parish Negroes,” a term I’m not familiar with) could not be placed — too young, too old, pregnant or postpartum, or disabled — so remained with widow Zilpha Scott, who received $15 for their care.
Estate of Benajah Scott, Probate Estate Case Files 1854-1959, http://www.familysearch.org.
I believe you’re correct that they were elderly, disabled, or otherwise unable to work. I’ve encountered the term used for poor whites, often written as “parish charge“ or “parish woman a man.”