Jack Jonesadj.n.
/ˌdʒak ˈdʒəʊnz/, U.S. /ˌdʒæk ˈdʒoʊnz/ British slang (originally Military).
A. adj.
Alone, on one's own. rare.
ΚΠ
1925 E. Fraser & J. Gibbons Soldier & Sailor Words 130 Jack Jones, alone.
2002 J. Canaday Invisible World 10 As Miss Doolittle might once have said, They're all Jack Jones in a bleedin' waste.
B. n.
Only in on one's Jack Jones: alone, on one's own. Cf. Pat Malone n., Tod Sloan n.
ΚΠ
1935 ‘G. Orwell’ Clergyman's Daughter ii. 156 A good night's kip all alone... All on your Jack Jones.
1972 A. Draper Death Penalty xx. 134 You're on your Jack Jones. Ben's deserted you.
2016 Sidmouth Herald (Nexis) 26 Aug. Is Mr Turner willing to stand there on his Jack Jones and do it?
This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022).
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adj.n.1925