subs. (common).—1.  A duck: also QUACKING-CHEAT and QUACKER.—HARMAN (1567); DEKKER (1616); B. E. (c. 1696); GROSE (1785).

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  1707.  J. SHIRLEY, The Triumph of Wit, ‘Rum-Mort’s Praise,’ &c.

                        A QUACKING CHEAT,
Or tib-o’-th’-buttry was our meat.

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  2.  See QUACKSALVER.

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  Verb. (old booksellers’).—See quot.—BAILEY (1726).

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  1715.  CENTLIVRE, A Gotham Election, i. 1. He has an admirable knack at QUACKING titles…. They tell me, when he gets an old good-for-nothing book, he claps a new title to it, and sells off the whole impression in a week.

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  IN A QUACK, phr. (Scots’).—In the shortest time possible: cf. CRACK.

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