J Cat 

(Prison/Jail Term) Any person who is mentally unstable or requires psyche drugs to maintain.

That fool over there talking to himself, walking like a chicken is a J Cat.

J Cat by Wood Dawger October 2, 2005

J Cat 

Otherwise known as "Category J" in the California Penal Code, it refers to an inmate deemed too mentally unstable to remain in General Population.

"Motherfucker went J Cat on someone in the yard; now he's in ADSEG."

J Cat by J. Knox April 23, 2008

j cat 

An individual who is looped up on psychiatric medications.

That girl's a j cat.

j cat by Doug March 28, 2005

j cat 

A person who does not follow through on something that they said they would do.or they fake on something that was planned out...

Maurice is a j cat because he didn't show up to the party like he said he would.

j cat by Mrz. Misha January 6, 2008

J Cat 

a punk ass person who is hella generic

that fool redskin is a straight up j cat!

J Cat by Jay aka F- October 27, 2004

J cat 

Union J consists of Josh Cuthbert, JJ Hamblett, Jaymi Hensley, and George Shelley. They ended up fourth place on the X Factor in 2012. A J Cat is a fan of Union J.

omg! I love Union j! I'm a J Cat!

J cat by J Cat For Ev June 13, 2013

J-Cat 

noun-
Literally meaning *'J'-Category*
—>California prison slang<—

A commonly used phrase in California prisons indicating a mentally unstable person, or someone whom is intentionally or unintentionally acting mentally unstable. Most commonly refers to a person who has been involuntarily admitted to mental health services, but also may be used as a derogatory adjective.

Derived from inmate mental health codes found in Article 9 and inmate classification administrative determinants found in Article 10 of the California Department of Corrections and Rehabilitation's Title 15, Rules and Regulations:
->"Article 9, section 3364.2 (j) The judicial hearing for an order authorizing the involuntary administration of psychiatric medication to an inmate shall be conducted by an ALJ"

Note: the 2020 Title 15, Article 10, section 3375.2 (17) has been revised to remove the 'J' designation and replaced with a 'PSY' three-letter code.

Alternate spellings:

Jay-Cat

jaycat

"Hey man, you see that guy over there? Yeah just don't interact with him, he's a j-cat for sure."
"Oh yeah, that guy Ronny just came back from Classification Committee and he's now a confirmed j-cat."
"I was grocery shopping yesterday and some j-cat came up to me and just started incoherently blabbering."
"Yo, Billy just acts like a j-cat so he can get free psych meds."

J-Cat by Pankakke.exe November 6, 2021