Source : Webster's Revised Unabridged Dictionary (1913)

Collogue \Col*logue"\, v. i. [Cf. L. colloqui and E. dialogue.
   Cf. {Collocution}.]
   To talk or confer secretly and confidentially; to converse,
   especially with evil intentions; to plot mischief. [Archaic
   or Colloq.]

         Pray go in; and, sister, salve the matter, Collogue
         with her again, and all shall be well.   --Greene.

         He had been colloguing with my wife.     --Thackeray.

Source : WordNet®

collogue
     v : confer secretly