Being a JCat means you are dedicated and obsessed with the British band Union J. If you are a JCat you'll know that George is the cute one, JJ is the dumb one, Josh is the weird one and Jaymi is the sassy one.
JCats can be cute, but if you insult one of their boys they will kill you. They are especially protective of George as he's like a baby and he is just fucking adorable, although we would actually love to have sex with him and all of them.

Yes, JCat is a cheesy name but we don't care because we're cute and better than you.
Also to be in the fandom you'd have to accept that yes, Jaymi is gay, the boys have a random liking to the hobby of twerking, mostly George, Josh has better eyebrows than you, George looks like Miranda Crosgrove, they are absolute freaks of nature and Josh has a twitter for his cat Oreo and pretends it's the cat that actually types the stuff.

Other than that, the boys adore their JCats and are always thanking them and telling them how much they love them, so come join the fandom!
"We love our JCats, they mean so much to us. We love you!"

"Does Taylor Swift have a beard?"

"A cabbage."

"Probably the sugar babes."

"Guys, let's twerk!"

"Oops! Monkeys don't swear!"

"Union J, the J stands for jackets..."

"Winner winner, chicken dinner!"

"I'm JJ and I like to ride ponys."

"And everyone was going, where's Josh, where's Josh? Where was he? Sitting on the toilet playing Pokemon."

"The wheels on the bus go round and round."

"Your our Union Jamily."
by UnionJamily March 18, 2013
Top Definition
(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.
by Wood Dawger October 02, 2005
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."
by J. Knox April 22, 2008
California Prison slang for a mentally Ill person. Shortened from Catagory "J" (Meaning Mental Patient/Inmate) to Jcat.
That guy down the tier talking to himself is a jcat!
by CJ Smith May 16, 2006
An individual who is looped up on psychiatric medications.
That girl's a j cat.
by Doug March 28, 2005
A psychotic breakdown.
anymore of this and im going to go j-cat.
by homerower April 13, 2006
a person who doesn't know how to act in jail (when in jail)
These new bitches in are tank are straight j-cats.
That fool keeps cattin off.
by Maguire Corrections October 11, 2010
J-CAT is an word now used in street slang that originated in the U.S. Federal and State prison systems as an acrynym with stood for J-Category inmates or J-CAT which is s housing unit for sex offenders. Most inmates detest sex offenders and do not associate with them. The word J-CAT became synonymous with someone you did not like, someone you thought was shadey or someone who was acting gay. The word then bleed into the streets from the prisons by released inmates. Over time the definition has broadened but the core of the word remains, it always indicates a negative feeling. J-CAT can also be used when someone is trying to duck, dodge or avoid someone, or someone who is consistently flaking and selling wolf tickets. In this scenario it is often shorten as in "Nigga where you been? "You been cattin off on me.. Whatchu scared of my nigga? Hit me back!" J-CAT is also used to describe a dope feen, some one who is now different, weird after ecsesive drug use.
Breh, that nigga Marcus he coo n shit but ever since that nigga ate dem shrooms, that nigga been acting like a straight J-Cat. Real Talk
by imastr8gee May 31, 2015

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