Sc. and north. dial. [f. COUP v.1 + -ER.] One who barters, deals, or buys and sells. Cf. COPER. Now chiefly in Comb., as herring-, horse-couper, etc.
1581. Sc. Acts Jas. VI. (1597), § 122. The halding of horses at hard meat all the Sommer season, vsed commounlie be Cowppers.
a. 1662. R. Baillie, Lett., I. 85 (Jam.). The horse which our coupers had bought at Morton fair.
1792. Statist. Acc. Scotl., VI. 44, note (Jam.). Nor are they a match for horse-cowpers, cow-cowpers,the people that farmers have to deal with.
1844. W. H. Maxwell, Sports & Adv. Scotl., xiii. (1853), 121. Its visitants, [were] Dutch herring-coupers.