(British, military slang, mostly, WWI) An experienced soldier.
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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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(British, military slang) A veteran soldier or war veteran.
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(British, slang, figuratively) Someone experienced in his or her field.
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