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The Collaborative International Dictionary
Qvacked

Quack \Quack\, v. i. [imp. & p. p. Qvacked; p. pr. & vb. n. Quacking.] [Of imitative origin; cf. D. kwaken, G. quacken, quaken, Icel. kvaka to twitter.]

  1. To utter a sound like the cry of a duck.

  2. To make vain and loud pretensions; to boast. `` To quack of universal cures.''
    --Hudibras.

  3. To act the part of a quack, or pretender.