Informal or dialectal term meaning resembling or characteristic of a don; relating to academic or scholarly demeanor in an exaggerated way.
From 'don' (university teacher) + '-sky' or '-y' suffix (informal descriptive ending). The term appears primarily in British informal speech describing someone acting in a donnish manner.
This is a great example of how English speakers invent informal adjectives by adding '-y' to nouns—'cat' becomes 'catty,' 'sport' becomes 'sporty,' so 'don' becomes 'donsky' for that academic vibe!
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