U.S. Also swinn(e)y. [prob. f. G. dial. schweine emaciation, atrophy, schweinen to become emaciated.] Atrophy of the shoulder-muscles in the horse. Also fig. of the ‘stiffness’ of pride or self-conceit.

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1855.  H. C. Kimball, in Jrnl. Discourses, II. 158/1. Too many have got the sweeny, and the skins are growing tight on their flesh.

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1887.  Sci. Amer., 30 July, 72/3. The shrinkage of the muscles of the shoulder, and which is commonly called ‘sweeny,’ is due to some lameness of the foot or limb.

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