J-cat

noun2

1. •
   (US, slang) A mentally unstable inmate.

   • 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! — 2003
2. •
   (slang) One who behaves in an erratic or overly excited manner.