Noun; an excitable individual, keen and knowledgable about Macintosh devices, so much so that self control can be lost. Often mis-spelt as Macspert.
Also

Noun
A sticky deposit found on a Macintosh device, left by a Macspert

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy