Definition of yackety-yak in English:

yackety-yak

Syllabification: yack·e·ty-yak
Pronunciation: /ˌyakədēˈyak
 
/
(also yackety-yack)

noun& verb

Another term for yak2.

Origin

1950s: imitative.

Definition of yackety-yak in:

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards