dial. or slang. [perh. a humorous use of prec., with the notion of ‘overshadowed’ or ‘obscured.’] Somewhat the worse for drink, tipsy.

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1730–6.  Bailey, Bosky, half or quite fuddled.

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1824.  Blackw. Mag., XVI. 573. He may be tipsy, bosky, cut, or anything but drunk.

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1840.  Th. Hook, in New Monthly Mag., LX. 11. Became, to use a colloquial expression, uncommonly bosky.

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