General theory of everything
The General Theory of Everything is a sarcastic coinage of Stanisław Lem introduced in 1966. The biographical sketch of Ijon Tichy in "The Twenty-eighth Voyage" of Tychy's Star Diaries says that a grandfather of Ijon, Jeremiasz Tichy, "decided to create the General Theory of Everything, and nothing stopped him from doing this".
Apart from being a precursor of the term "Theory of Everything," the term GTE was used to characterize Lem's essays of fundamental character, such as The [Philosophy of Chance] and Science Fiction and Futurology, as well as the pseudoscientific work of Polish scifi writer Adam Wiśniewski-Snerg, Jednolita teoria czasoprzestrzeni