In my reading of chapter XXV, Postscript I came across a peculiar word which no online or offline dictionary has offered any definition. The word is 'quoggy'. The word in context is used in this sentence: "In truth, a mature man who uses hair-oil, unless medicinally, that man has probably got a quoggy spot in him somewhere." Does anyone know what the word means and if, perhaps, Melville coined the word himself?