Thieves’ cant. Also buzgloak. [f. BUZZ v.3] A pickpocket.

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1812.  J. H. Vaux, Flash Dict., Buz-cove or Buz-gloak, a pickpocket; a person who is clever at this practice, is said to be a good buz.

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1830.  Lytton, P. Clifford, 56. He is nothing better than a buzz gloak.

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1859.  Sala, Tw. round Clock, 175. These copper captains and cozening buzgloaks.

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