Top definition
A large oil slick that seems impossible to stop. From Armus, the name of an evil, oil-slick-like creature that kills its victims by enveloping and suffocating them, in an early "Star Trek: the Next Generation" episode.
The armus that's spreading through the Gulf of Mexico may well prove to be the worst ecological disaster that the Gulf has ever faced.
by pentozali May 03, 2010
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