An emphatic Irish English exclamation, a variant spelling of begorra expressing surprise or strong emotion.
Irish English variant of begorra, with the same origin from 'by God' with phonetic alterations. The double-r spelling is an alternate representation of the Irish English pronunciation.
The multiple spellings—'begorra,' 'begorrah,' 'begorah'—show how dialect words get written down inconsistently, since there was no standard spelling for this informal exclamation that people spoke rather than wrote.
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