v. & n. --n. the harsh sound made by ducks. --v.intr. 1 utter this sound. 2 colloq. talk loudly and foolishly. [imit.: cf. Du. kwakken, G quacken croak, quack]
QUACK
Meaning of QUACK in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012