Hypertext Webster Gateway: "Quacking"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
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