Synonyms for yack
EXAMPLES FROM THE WEB FOR YACK
Yack, he picks up the trail from here to where you can follow easy.
Church a yack (or watch), to take the works of a watch from its original case, and put them into another one, to avoid detection.
Tom perceived Andrew's useless emulation, and with a sound translated by 'yack,' sent his leg out a long way.
This latter name accords with Macgillivray's mode of spelling its note, yack chuck, harsh enough, no one will deny.
"to talk, to chatter," slang, 1950, probably echoic (cf. Australian slang yacker "talk, conversation," 1882). Yackety is recorded from 1953.