Short for JOHN BULL. Hence Bullism = JOHN BULLISM.
1825. Carlyle, Early Lett. (Norton), II. 295. Bull himself, again, though a frank, beef-loving, joyous kind of person, is excessively stupid.
1843. Syd. Smith, Wks. (1867), II. 331. Bull is naturally disposed to love you, but he loves nobody who does not pay him.
1821. Blackw. Mag., X. Aug., 89. English jurors have been lately so bepreached out of bullism by him, as to give upwards of sixpence damages for a broken head.