The Collaborative International Dictionary of English v.0.48:
Shrag \Shrag\, n. [CF. Scrag.] A twig of a tree cut off. [Obs.] [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Shrag \Shrag\, v. t. To trim, as trees; to lop. [Obs.] [1913 Webster]