ampullosity
n. pretentious use of language

Though much hath been written and said in order to render the Lexiphantic style ridiculous, yet it is surprising to see how it keeps its ground among circles of a certain kind, where even good sense is by no means a stranger: — let the following card witness, which was really sent by a gentleman to a lady, who had asked his company to tea and supper: — ‘Mr. F—-‘s compliments to Miss S—-, at your post meridian computation, be not fascinated with the ardescence of my bibulating in co, since anterior motives stimulate me to itinerate in a transverse direction. But after the diurnal operosity hath increased the delectability of Vesper, perhaps I may saturate a wonted appetite, by the contuding that petacious root, so nice an esculent, if humidated by butter, joined to mellifluous conviviality.’ — It was read twice before the lady found out that the writer excused himself from coming to tea, but would probably eat a roasted potatoe with her at night.

— Geoffry Gambado, New Oddest of All Oddities, for 1813