A worn-out, shabby, or ill-fitting boot; an old shoe in poor condition.
From 'crow' (worthless, decaying) + 'boot' (footwear). This Scottish and Northern English dialect term applied the 'crow-' prefix to any article of worn clothing, following the pattern of 'crowbait' and 'crowbill'.
The 'crow-' prefix in rural dialects became a whole category of insults for broken things—if it was worn out, it got the 'crow' treatment, creating words like crowboot, crowbait, and crowbill all at once.
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