goodyear

† goodyear Obs.
  Also 6–7 goodier, -yeare, -year(e)s, (6 goodere, 7 goodye(e)re); and in pseudo-etymological forms goujeres, goujeers.
  [good a. + year¹. The expletive use in questions (What the good year?) is equivalent to, and possibly adopted from, the early mod.Du. wat goedtjaar. Plantijn (1573) renders Wat goet iaer is dat? by F. Que bon heur est cela? and L. Quid hoc ominis? The Du. lexicographers suggest that the idiom probably arose from an elliptical use of good year as an exclamation, = ‘as I hope for a good year’. One example of goed jaar approximating to the later Eng. sense (b. below) is quoted in the Wb. der Nederl. Taal V. 311.
  Sir T. Hanmer, in his edition of Shakes. (1744), suggested that in the three Shakes. passages good yeare(s had the sense of the French disease', and was a ‘corruption’ of goujeres, a hypothetical derivative of ‘the French word gouje, which signifies a common Camp-Trull’. So far as the sense is concerned, this explanation is curiously plausible, as it seems to be applicable without any violence to all the examples of the word (cf. what the pox, etc.). But there is no evidence that the definite meaning of ‘pox’ was really intended by any of the writers who used the word; and the alleged etymology is utterly inadmissible. Hanmer's spurious form goujeres or goujeers has, however, found its way into many editions of Shakespeare, and was adopted as the standard form in Johnson's Dict. 1755, and hence in every later Dict. which contains the word.]
  a. Used as a meaningless expletive, chiefly in the interrogative phrase what a (or the) goodyear. b. App. from the equivalence of this phrase with what the devil, what the plague, what the pox, etc., the word came to be used in imprecatory phrases as denoting some undefined malefic power or agency.

Oxford English Dictionary