Markoff Chaney (also known as The Midget, abbreviated The MGT) is a character (with an undetermined form of dwarfism) in Illuminatus!.
His name is derived from the mathematical principle of a Markov Chain, meaning a related series in a random process. He also had no relation to the famous Chaney's of Hollywood, though the joke was often made by others.
His father was a stockholder in Blue Sky Inc. which granted him a small annuity fund every month. Frequently cut his classes at Antioch College in Yellow Springs, Ohio (which he attended at the same time as Simon Moon and Atlanta Hope).
Sexually frustrated, addicted to Playboy and pornographic tarot cards. Markoff Chaney decided to take revenge on the world of giant people. One of his revenge tactics was a one-man Operation Mindfuck to create and distribute signs with unusual or crazy instructions. They were signed 'the MGT.', referring not to 'the management' so much as 'the midget.'