yackety-yak

[yak-i-tee-yak] /ˈyæk ɪ tiˈyæk/
verb (used without object), yackety-yakked, yackety-yakking, noun
1.
yak2 .
Also, yackety-yack, yakety-yak, yakity-yak.
Origin
1945-50; apparently imitative
British Dictionary definitions for yackety-yak

yackety-yak

/ˌjækɪtɪˈjæk/
noun
1.
(slang) noisy, continuous, and trivial talk or conversation Sometimes shortened to yak
Word Origin
of imitative origin