conspire with (one)

conspire with (one)

To plot or scheme with one. What are you kids whispering about back there? You better not be conspiring with each other! The president of the company conspired with his assistant to conceal all evidence of his crime.
See also: conspire
Farlex Dictionary of Idioms.

conspire with someone (against someone or something)

 and conspire (with someone) against someone or something
to join with someone in a plot against someone or something else. The CEO conspired with the board of directors against the stockholders. Ed conspired with Sam against the plan.
See also: conspire
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • conspire with
  • connive with (one)
  • brew a plot
  • connive
  • connive at (something) with (one)
  • connive at
  • connive at (something)
  • plot (something) out
  • plot out
  • foment trouble