Definition of "yarr"

yarr¹

verb
third-person singular simple present yarrs, present participle yarring, simple past and past participle yarred
1. (intransitive, archaic) To growl or snarl like a dog.
  Quotations
  She yapped and yarred and ran in foolish circles, as though quarrelling with her own tail.
  1921, Chamber's Journal
  And when he saw that all the dogs were flocking about her, yarring at the retardment of their access to her, and every way keeping such a coil with her as they are wont to do about a proud or salt bitch, he forthwith departed […]
  1653, François Rabelais, translated by Thomas Urquhart, Gargantua and Pantagruel

yarr²

noun
uncountable
1. (UK, dialect) The plant Spergula arvensis, corn spurry.

yarr³

interjection
1. Alternative form of arr (“used stereotypically in imitation of pirates”)