on one's Jack Jones

Prepositional phrase

Cockney slang

(Cockney rhyming slang) On one's own; alone.

Japanese Meaning

一人で / 自分自身だけで

After moving to the city, one can easily find oneself on one's Jack Jones, struggling to make new friends.

都会に引っ越すと、友達を作るのに苦労して、あっという間に一人で過ごすことになることがある。

Sense（1）

(Cockney rhyming slang) On one's own; alone.