Definition of "scup"

A saltwater fish, a cousin of porgies and scups. The sheepshead has large, broad incisor teeth, much like a sheep.

1995, “sheepshead”, entry in Percy Russell, Anita Williams, The Nutrition and Health Dictionary, page 391

Scup, in the Bay also called porgy, maiden, and fairmaid, are rather plain-looking fish — dull silver with 12 to 15 indistinct vertical stripes, flecked with light blue on their sides.

2006, Alice Jane Lippson, Robert L. Lippson, Life in the Chesapeake Bay, page 276

On a lark, he took a small scup, or porgy, and a stamp pad and demonstrated how to make a print.

2007 August 8, Brett Martin, “First a Hook, Then Ink: An Artist’s Catch”, in New York Times‎