Term with derogatory undertones, used by the U.S.A government to characterize countries that "are suspected to harbour terrorism" and that are supposed to have formed an unofficial alliance, supposedly to justify invasion. The terms comes from "Axis", the nickname for the WWII German-Italian Alliance.
Russia doesn't belong to the "axis of evil" because it is too dangerous to confront.
The situation where a recent catastrophe is further complicated by some application of Murphy's Law or further revelations. Taken from the mental image of the "fragrant and pictorial" messthat excrement would make if it came into contact with the blades of a fan...
It was bad enough when they caught him rolling in the hay with a girl, but the shit really hit the fan when it was reported that she was underage.