quacking

verb

1. (form-of, gerund, participle, present)present participle and gerund of quack

   “The usual note emitted by this genus is a kind of tremulous querulous bark, not very unlike the quacking voice of a duck. Although all our larger squirrels […]”

adj

1. Making quacking sounds, or prone to doing so.

noun

1. The sound made by a group of ducks; quacks.