Scottish National Dictionary (1700–)
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First published 1974 (SND Vol. IX).
This entry has not been updated since then but may contain minor corrections and revisions.
SUCK, v. Also shuck. To incite or urge on a dog to chase or attack (Ork. 1929 Marw.), freq. in phr. suck a dog! as a call to the dog (Id.).
[Norw. dial. sukka, id., Dan. dial. suk!, a call to incite a dog, appar. ad. Ger. suche, imper. of suchen, to seek. Cf. Eng. seek, id., and Sigg.]