The Collaborative International Dictionary of English v.0.48:
Swinney \Swin"ney\, n. (Far.) See Sweeny. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Sweeny \Swee"ny\, n. (Far.) An atrophy of the muscles of the shoulder in horses; also, atrophy of any muscle in horses. [Written also swinney.] [1913 Webster]