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cotter pin

(US) A split pin, the ends of which project through an object being fastened and are bent back to hold it in place.

ˈkɑtɚ ˈpɪn261 viewsLast reviewed Jun 29, 2026+ Add a definition
🇬🇧 British & Irish slang
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UK
#1·Apr 27, 2026UK

(US) A split pin, the ends of which project through an object being fastened and are bent back to hold it in place.

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UK
#2·Apr 27, 2026UK

(UK) A pin or wedge inserted through a slot to hold machine parts together; a cotter.

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UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.

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