[n] a crafty and involved plot to achieve your (usually sinister) ends
\Mach`i*na"tion\, n. [L. machinatio: cf. F. machination.]
1. The act of machinating. --Shak.
2. That which is devised; a device; a hostile or treacherous scheme; an artful design or plot. Devilish machinations come to naught. --Milton. His ingenious machinations had failed. --Macaulay.