All 3 Uses

jargon
in
Brideshead Revisited
(Auto-generated)

Nor will I have undraped models all over the house, nor critics with their horrible jargon.†
p. 166.9

jargon = specialized vocabulary
I knew what she meant, and in that moment felt as though I had shaken off some of the dust and grit of ten dry years; then and always, however she spoke to me, in half sentences, single words, stock phrases of contemporary jargon, in scarcely perceptible movements of eyes or lips or hands, however inexpressible her thought, however quick and far it had glanced from the matter in hand, however deep it had plunged, as it often did, straight from the surface to the depths, I knew; even that day when I still stood on the extreme verge of love, I knew what she meant.†
p. 290.7
At first he wouldn't have anything to do with Sebastian; spouted all the official jargon about the rebirth of his country, and his belonging to his country, and finding self-realization in the life of the race.†
p. 352.9 *

Definitions:

(1) (jargon)
words or expressions commonly used in a particular field but not understood by most people
(2) (meaning too rare to warrant focus)
Much less commonly, jargon can reference nonsensical use of words.