Scottish National Dictionary (1700–)
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First published 1960 (SND Vol. V).
This entry has not been updated since then but may contain minor corrections and revisions.
HEEDABO, adj. “Reckless, careless in behaviour, ‘head-over-heels'” (Ork. 1929 Marw., Ork. 1956).
[Origin uncertain. The first syllable is prob. Heid.]