Scottish National Dictionary (1700–)
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First published 1971 (SND Vol. VIII).
This entry has not been updated since then but may contain minor corrections and revisions.
†SMUD, n. A stench (Sc. 1818 Sawers), rather a suffocating smoke (Rnf. c.1850 Crawfurd MSS. (N.L.S.) S.101).
[Orig. uncertain.?Cf. n.Eng. and U.S. smudge, id., and Smad, v.2]