definition of
mephistophelean

[1] #1 mephistophelean s. [devilish, diabolic, diabolical, mephistophelian] showing the cunning or ingenuity or wickedness typical of a devil; "devilish schemes"; "the cold calculation and diabolic art of some statesmen"; "the diabolical expression on his face"; "a mephistophelian glint in his eye". wn