[agent-n. f. KNUCKLE v.]

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  1.  Thieves’ slang. A pick-pocket.

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1834.  H. Ainsworth, Rookwood, III. v. No knuckler so deftly could fake a cly.

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  2.  A schoolboy’s marble used in knuckling.

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1896.  Crockett, Cleg Kelly, ii. 7. One noble knuckler of alabaster.

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