shit talk vs yackety-yak

shit talk

verb
  • Synonym of talk shit 

noun
  • Derogatory speech regarding someone or something. 

yackety-yak

verb
  • To talk pointlessly and uninterruptedly. 

noun
  • prolonged chatter; uninterrupted, idle talk; gossip 

How often have the words shit talk and yackety-yak occurred in a corpus of books? (source: Google Ngram Viewer )