Common slang term in the outer system for a slug-like device that etches or pigments mottoes or sigils of organizations onto random objects as a form of advertising. Most are bionano systems, but occasional mechanical or synano variants have been found. there are occasional variants allegedly designed to apply medusa fractals or other aggressive technologies. Occasionally termed "Madvert Goo", especially if self-replicating.
Text by John B
Initially published on 25 April 2005.