Sentence:  The <WSD>slipslop</WSD> which Sir Edward put into the mouth of Mrs. Mivers, the gibberish in which Beck gabbles, may, for all that we know, be totally unlike the language of the back-parlour and of the crossing; and while that doubt continues, the imitation gives us no pleasure. 
Meaning of the word marked with <WSD> tags:  Nonsense; gibberish; twaddle.