Quacker
/ˈkwæk.ər/noun
A person or thing that quacks; especially, a duck or a noisy, insincere talker.
Did you know?English *quack* is an onomatopoeic word, and its later sense for a fraudulent healer or pretender helped turn “quacker” into a sneaky insult for someone all noise and no truth.
Etymological Timeline
Late Middle English
English
quakken
“to make a quacking or croaking sound”
16th Century
English
quack
“the cry of a duck; later, a noisy or pretending person”
17th Century
English
quacker
“one who quacks; a duck or noisy person”
Modern English
English
quacker
“a duck, or a person who quacks; by extension, a noisy or pretentious speaker”