Sentence:  ... she doesn't have the precision of a Jean Arthur, yet she has some of that rueful, fluffy-in-the-head charm of someone whose brains are addled by her sexual impulses, and she adds the blur in the expression and those tremulous, <WSD>zonky</WSD> eyes. 
Meaning of the word marked with <WSD> tags:  Weird, odd, eccentric.<ref>John Ayto, "The Oxford Dictionary of Slang", Oxford University Press, 1998, p. 427,[https://archive.org/details/oxforddictionary00john]</ref>