A newly arriving inmate is referred to as a "fish," told to watch out for "the man," and warned about the consequences of "snitching." These are best described as examples of:

Question

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These terms are part of prison slang or jargon, which is referred to as "prison argot." It's a specialized language used by inmates to communicate among themselves, often including terms that are unique to the prison environment.

A Newly Arriving Inmate Is Referred to as a "Fish