Definition of pibble-pabble in US English:

pibble-pabble

noun

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.

Pronunciation

pibble-pabble

/ˈpɪblˌpabl/