Scottish National Dictionary (1700–)
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First published 1968 (SND Vol. VII).
This entry has not been updated since then but may contain minor corrections and revisions.
¶PLETSHACH, n. A drink made of hot water and oatmeal, seasoned with sugar, pepper or the like (Per.1 1922).
[The form is somewhat dubious. The word has the same meaning as plottie s.v. Plot, and should phs. be plotshach. Cf. also Gael. plodag, warm gruel, from the same orig.]