Past tense of birl; rotated or spun, especially a log in log-rolling, or (in the other sense) entertained or caroused.
Simple past tense formation of 'birl,' adding the regular '-ed' ending to create the past participle form.
The past tense seems simple, but it demonstrates how 'birl' successfully made the leap from regional Scottish term to North American logging vocabulary—people 'birled' logs across an entire continent!
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