Definition: 1: lacking nutritive value  2: devoid of significance or interest : dull   3: juvenile, puerile

Eymology: Latin jejunus empty of food, hungry, meager

Quotation:

Reaching for easy irony by jumbling together events large and small, Perlstein piles up jejune incongruities, like: “The month of March came in like a lamb with Frank Sinatra sweeping the Grammy awards and went out like a lion with Jimi Hendrix in the hospital after burning himself while immolating his guitar.” As Truman Capote said of Jack Kerouac’s fiction, that is not writing, that is typing.

- from a review of “Nixonland” in The New York Times Book Review by George F. Will

I can see some snooty, holier-than-thou, thin-cigarette-smoking, beret-wearing, PBR-sipping hipster dismissing just about any statement with this word.