Sentence:  “Look here, friend,” said I, “if you have anything important to tell us, out with it; but if you are only trying to <WSD>bamboozle</WSD> us, you are mistaken in your game; that's all I have to say.” 
Meaning of the word marked with <WSD> tags:  To con, defraud, trick, to make a fool of, to humbug or impose on someone.