Recent events here have led me to consider this question. It must be said that lots of physics crackpottery is rather short on entertainment value. But I've found an exception, at least for me: the theories of George Francis Gillette. I first learned of his theories from Martin Gardner's Fads and Fallacies in the Name of Science.
Like many other anti-relativity crackpots, GFG claimed to be restoring Newtonian physics; he admired Sir Isaac Newton as the greatest genius who ever lived. He even claimed that his "spiral universe" theory "out-Newton's Newton". What is it?
The ultimate units: "unimotes". Our Universe: a "supraunimote". The cosmos: a "maximote". There's also an "ultimote" which is the "Nth sub-universe plane":
GFG physics features "bumping" very prominently. All motions ever strive to go straight--until they bump." "Nothing else happens at all. That's all there is." "In all the cosmos there is naught but straight-flying bumping, caroming, and again straight flying. Phenomena are but lumps, jumps, and bumps. A mass unit's career is but lumping, jumping, bumping, rejumping, rebumping, and finally unlumping."Each ultimote is simultaneously an integral part of zillions of otherplane units and only thus is its infinite allplane velocity and energy subdivided into zillions of finite planar quotas of velocity and energy.
His physics also features his "backscrewing theory of gravity." He explains it as "Gravitation is the kicked back nut of the screwing bolt of radiation." "Gravitation and backscrewing are synonymous. All mass units are solar systems...of interscrewed subunits." and "Gravitation is naught but that reaction in the form of subplanar solar systems screwing through higher plane masses."
He expounded his theories in Rational, Non-Mystical Cosmos (1933), and in a shorter work, Orthodox Oxen (1929). He boasted that the latter book is completely free of "Hi-de-hi mathematics" and that it is "bristling with new axioms." It also contains numerous diagrams of the likes of "The all cosmos doughnut," and a "Laminated, solid, solid, solid, solid."