J-cat

noun, slang

noun, slang ·Uncommon ·College level

Definitions

Noun
  1. 1
    A mentally unstable inmate. US, slang

    "Fuckers never see the light of day. Nevada Fucking Prisneyland, O.G.! Homos, snitches, Chomos, straight-up J-Cats, and children all P.C.'d up together, scandalous shit, dawg!"

  2. 2
    One who behaves in an erratic or overly excited manner. slang

Example

More examples

"Fuckers never see the light of day. Nevada Fucking Prisneyland, O.G.! Homos, snitches, Chomos, straight-up J-Cats, and children all P.C.'d up together, scandalous shit, dawg!"

Etymology

Short for J-Category (also Category-J), a former designation used for mentally ill prisoners in the California State Prison System.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.