Definition of "copacetic"

["] […] an' as to looks I'd call him, as ye might say, real copasetic." Mrs. Lukins expressed this opinion solemnly and with a slight cough. Its last word stood for nothing more than an indefinite depth of meaning. […] There was one other word in her lexicon which was in the nature of a jewel to be used only on special occasions. It was the word "copasetic".

1919, Irving Bacheller, A Man for the Ages: A Story of the Builders of Democracy‎, New York, N.Y.: Grosset & Dunlap, pages 69 and 287

Molly-squally, Miss Molly / Yeah, everything copacetic, now

1967, “Niki Hoeky”, in Enigma, performed by P. J. Proby

Count the cash, clean the oven, dump the trash, oh your loving is a rare and a copacetic gift.

1976, “I Can’t Wait to Get Off Work (and See My Baby on Montgomery Avenue)”, performed by Tom Waits

It’s a shame those boys couldn’t be more copacetic.

1987, “West L.A. Fadeaway”, performed by Grateful Dead

Colombia and Brazil were supposed to be more copacetic.

2014 July 5, Sam Borden, “For bellicose Brazil, payback carries heavy price: Loss of Neymar ”, in The New York Times

I keep it real, niggas better keep it copacetic

2018, “Open Letter”, in Tha Carter V, performed by Lil Wayne

We’re only a few months into the Congress, and there are plenty of opportunities for bigger gulfs to appear; partisans agree on most things most of the time because most votes aren’t on hot-button issues. Nor does it make sense to pretend that everything’s copacetic.

2019 July 12, David A. Graham, “The Overhyped Feud Between Nancy Pelosi and AOC”, in The Atlantic‎