Scottish dialect: stupid, dull-witted, or foolish; resembling a donkey in mental capacity.
Related to dialectal terms for foolishness, possibly influenced by 'donkey' semantically but with unclear exact etymology, primarily recorded in Scottish English.
Scottish English is full of colorful insults, and 'donnert' is particularly interesting because it might be related to both 'donkey' and 'dazed/struck,' suggesting someone too foolish to respond properly when something happens.
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