The Canadian Destroyer is a professional wrestling move. The Canadian Destroyer is a flip piledriver-like maneuver. The name comes from Canadian and TNA wrestler Petey Williams, as he's the person most associated with the move. It's clearly a piledriver variant, but has usually been ruled as a legal maneuver in lucha libre matches. Amazing Red is credited with having invented the move with help from Quiet Storm.
The name only makes sense with Williams, but it's stuck as the generic idea for lack of a better idea. Ozz has dubbed this move 'La Darketa when using it as a finish. Teddy Hart used a double underhook version of this move while in AAA.