In political jargon, a self-licking ice cream cone is a self-perpetuating system that has no purpose other than to sustain itself. The phrase appears to have been first used in 1992, in ‘On Self-Licking Ice Cream Cones,’ a paper by Pete Worden about NASA’s bureaucracy.
It has come to be used as a metaphor for any similar system, particularly in contexts such as the War on Terror and the military-industrial complex.
The Daily Omnivore 