the jack
The phone.
Definitions
The inmate telephone. 'On the jack' means on the phone.
the jack In A Sentence
Origin & Usage
From the phone 'jack' (connector plug).
People Also Ask
What does 'the jack' mean in prison?
It's slang for the inmate telephone. Being 'on the jack' means being on the phone.
How do you use 'the jack'?
You get 'on the jack' to make a call, as in 'He was on the jack with his lawyer all afternoon.'
Where does the term come from?
It comes from the phone 'jack,' the connector plug the telephone line uses.
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