Definition of "yack"

yack¹

/jæk/

noun
plural yacks
1. Alternative form of yak (“chatter; talk”)
verb
third-person singular simple present yacks, present participle yacking, simple past and past participle yacked
1. Alternative form of yak (“talk; vomit”)
  Quotations
  “If we do a deal, no one ever hears about it. Others yack but Iwan never does. It is very Swiss.”
  2024 March 2, John Gapper, “Planet Wirth”, in FT Weekend, Life & Arts, page 2

yack²

/jak/

noun
plural yacks
1. (England, dialectal, possibly obsolete) An oak.
  Quotations
  If 't ash tree buds before 't yack, […]
  1877, Gibson, Leg. and Notes 50
  Awd stiff yack nut eeasy bended, […]
  1878, John Castillo, Poems in the North Yorkshire Dialect, section 25

yack³

noun
plural yacks
1. (UK, thieves slang, obsolete) A watch (timepiece).
  Quotations
  I have got the Yacks, so do not come it. Fight cocum.
  1859, Snowden's magistrates assistant, page 498
  […] and away I scampered with the tiddlywink-table, while Teddy Limber […] frisked the yokel of his yack and skin.
  1863, George William MacArthur Reynolds, The Mysteries of the Court of London, volume 3, page 86