J-Cat
A mentally unstable inmate whose behaviour is wildly unpredictable.
Definitions
A prisoner classified as psychiatrically disturbed — the guy who might talk to the wall for an hour then try to bite a guard. The 'J' refers to California Department of Corrections category J, the designation for inmates needing psychiatric housing. You give a J-Cat a wide berth.
J-Cat In A Sentence
Origin & Usage
California prison system. From CDC classification code 'Category J' for mentally disordered inmates, dating to the 1960s–70s.
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