Early 17th century; earliest use found in William Shakespeare (1564–1616), playwright and poet. Representing a supposed Welsh English pronunciation of bibble-babble.
Definition of pibble-pabble in US English:
pibble-pabble
nounˈpɪblˌpabl
rare
Idle, empty, or childish talk; = "bibble-babble".
Origin
Early 17th century; earliest use found in William Shakespeare (1564–1616), playwright and poet. Representing a supposed Welsh English pronunciation of bibble-babble.