olive oil, phr. — Green’s Dictionary of Slang

olive oil phr.

[mispron. of Fr. au revoir, goodbye]

(orig. music-hall) goodbye.

1896		Regiment 15 Aug. 301/2: Bow-wow, my adieux. So-longs, and Olive oils.
1909		J. Ware Passing Eng. of the Victorian Era.
1914		T. McNamara Us Boys 21 Nov. [synd. cartoon strip] Well, oilve oil, as we say at the club.