Definition of "verjuice"

verjuice

/ˈvɝd͡ʒuːs/

noun
usually uncountable, plural verjuices
1. A very acidic juice made by pressing unripe grapes.
  Quotations
  In this inſtance, there is (vpon the by) to be noted the Percolation, or Suing of the Veriuyce thorow the VVood; So as it ſeemeth, it muſt be firſt in a kinde of Vapour, before it paſſe.
  1631, Francis [Bacon], “I. Century.”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], 3rd edition, London: […] William Rawley; [p]rinted by J[ohn] H[aviland] for William Lee […], paragraph 79, page 25
verb
third-person singular simple present verjuices, present participle verjuicing, simple past and past participle verjuiced
1. (transitive) To render something sour; to embitter.
  Quotations
  There are few names to which a jingle or a joke cannot be fitted—witness, Twining, banker and tea-dealer: / ‘Twining would be whining / Were’t not for his tea;’ / and the ex-Lord Mayor, Sir John Key, where the inherent rhyme to ‘donkey’ verjuiced the baronetcy.
  1892, W[illiam] G[eorge] Thorpe, “Early Life and School Days”, in The Still Life of the Middle Temple with Some of Its Table Talk Preceded by Fifty Years’ Reminiscences, London: Richard Bentley and Son […], page 3