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
12 more definitions
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
The fans of union j (a british boygroup) are called jcats. People who say ''You're fan and I'm a jcat'' are actually wrong because a fan and jcat are the same,but jcat sounds just really cringey and cheesy. You're are not better than other people when you call yourself a jcat. So for the cheesy carrots out there who are thirsty for retweets A FAN AND A JCAT ARE THE SAME but the fandom is really lovely not that big so many people know eachother there is ofcourse sometimes stupid drama but we get through it everytime TOGETHER WE'RE ALL IN THIS TOGETHER BLABLA we're bad bitches yo yo yo choo choo luff u all we got that british swag.
Girl : DID YOU HEAR ABOUT THAT BOYGROUP
Girl : YES THEY'RE SEXGODS !!!!!!

Girl : Rt if you're a jcat and not a fan
Girl : do you need some water?
by imanotafanimajcatyolo December 15, 2012

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