Short for JOHN BULL. Hence Bullism = JOHN BULLISM.

1

1825.  Carlyle, Early Lett. (Norton), II. 295. Bull himself, again, though a frank, beef-loving, joyous kind of person, is excessively stupid.

2

1843.  Syd. Smith, Wks. (1867), II. 331. Bull is naturally disposed to love you, but he loves nobody who does not pay him.

3

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.

4