Originally Posted by jshzh
The new edition has "copacetic"...
adjective or copasetic ...origin unknown slang: very satisfactory: fine and dandy His smile told him that everything was copacetic -- Robert Bloch
I think the origin of the word was the bastardization of either a Korean or Japanese word meaning the equivalent of OK and used the same way.
I didn't recognize the word at first. Although I have used the word "copasetic" many times, in the past, I have never seen it in print. It was a common expression used by G.I.s during the Korean War.
Regards - John