Definition & Meaning of "bunk restriction"in English

What does "bunk restriction" mean in prison slang?

The structure combines "bunk" (a narrow bed in a cell or dormitory) with "restriction," forming a compound noun for a specific type of penalty. It is used to describe a punishment requiring an inmate to stay in their bunk except for bathroom use or meals, often imposed for minor infractions like fighting, disrespect, or failing to follow orders. People typically refer to "bunk restriction" as a step below solitary confinement, limiting movement while keeping the inmate in general population. The term originated in American prison and jail systems during the 20th century, remaining common in correctional officer jargon and inmate slang.