DICT.TW Dictionary Taiwan

 Clack v. i. [imp. & p. p. Clacked p. pr. & vb. n. Clacking.]
 1. To make a sudden, sharp noise, or a succesion of such noises, as by striking an object, or by collision of parts; to rattle; to click.
    We heard Mr.Hodson's whip clacking on the ahoulders of the poor little wretches.   --Thackeray.
 2. To utter words rapidly and continually, or with abruptness; to let the tongue run.