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.
UPDORROK, adj. Also uppdorrok (Jak.), updorrick, updorruck. Exhausted, worn out, bankrupt (Sh. 1825 Jam., c.1870 E.D.D., updorruck, 1908 Jak. (1928)).
[Orig. obscure.]