on (one's) Jack

on (one's) Jack

old-fashioned Alone, abandoned, or isolated; on one's own. Primarily heard in UK. Coming home from the war, many veterans felt as though they were on their Jack as they tried to re-enter civilian life.
See also: jack, on
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

on your Jack

on your own. British informal
This an abbreviation of the rhyming slang expression on your Jack Jones .
See also: jack, on
Farlex Partner Idioms Dictionary © Farlex 2017
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