Popish Plot
noun
an imaginary conspiracy against the crown of Great Britain on the part of English Roman Catholics, fabricated in 1678 by Titus Oates as a means of gaining power.
British Dictionary definitions for popish plot
Popish Plot
noun
a supposed conspiracy (1678) to murder Charles II of England and replace him with his Catholic brother James: in reality a fabrication by the informer Titus Oates