From HomoExcelsior

Mataglap is an Indonesian word meaning "dark eye" or, probably, "dilated eye." It is an indication that someone is about to go berserk and start killing people at random. I applied the word in Aristoi to a berserk form of nanotechnology that devoured the planet. (From Walter John Williams FAQ). See also grey goo [First used in the nanotech sense in Aristoi 1992].

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