Definition of yackety-yak in English:

yackety-yak

(also yackety-yack)

noun

informal
  • Trivial or unduly persistent conversation.

    ‘you'll have to cope with the ringtones and yackety-yak of fellow passengers’

verb

[NO OBJECT]informal
  • Talk at length about trivial or boring subjects.

Origin

1950s: imitative: compare with yak.

Pronunciation

yackety-yak

/ˌyakədēˈyak//ˌjækədiˈjæk/