(UK) Large girls' underpants traditionally worn as shorts during school sports activities.
"But instead of going there, I sneaked into the Trunchbull's room. And after a speedy search I found the drawer where she kept all her gym knickers."
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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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