~ 1
■ noun a strong outdoor shoe with ornamental perforated patterns in the leather.
↘a rough shoe of untanned leather, formerly worn in Ireland and the Scottish Highlands.
Origin
C16: from Sc. Gaelic and Ir. bróg , from ON brók (rel. to breech ).
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~ 2
■ noun a marked accent, especially Irish or Scottish, when speaking English.
Origin
C18: perh. allusively from ~ 1 , referring to the rough footwear of Irish peasants.