The Collaborative International Dictionary of English v.0.48:

Brogue \Brogue\, n. [Ir. & Gael. brog shoe, hoof.]
   1. A stout, coarse shoe; a brogan.
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   Note: In the Highlands of Scotland, the ancient brogue was
         made of horsehide or deerskin, untanned or tenned with
         the hair on, gathered round the ankle with a thong. The
         name was afterward given to any shoe worn as a part of
         the Highland costume.
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   Clouted brogues, patched brogues; also, brogues studded
      with nails. See under Clout, v. t.
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   2. A dialectic pronunciation; esp. the Irish manner of
      pronouncing English.
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            Or take, Hibernis, thy still ranker brogue. --Lloyd.
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