An infection of the brain exclusively found in high school students in their third year. Symptoms include but are not limited to laziness, procrastination, demotivation to do homework, and taking on rigorous course loads without wanting to do the resulting work. Most infected students manage to avoid temptation to fail classes. Believed to be caused by taking too many AP/college/honors classes. There is no known cure, but treatments include snow days, long weekends, electives, study halls, "study" groups (a.k.a. doing five minutes of homework before playing Halo), and chemistry teachers conducting dangerous experiments that go haywire.
Not to be confused with senioritis.
The AP student, having junioritis, defined junioritis on Urban Dictionary to procrastinate on homework.
by Orlandomagicfan November 05, 2013
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A sweet loving ugly boy with a peng smile and always knows how to make a person who is in a bad mood turn happy also he is a friendly, caring, loving person. On the other hand he can be annoying but knows his limits and never lets anyone down and he is cheeky one. Junior is a guy who knows how to bang convo with a girl and when he’s inna relationship he will make sure a girl is always happy around him and compliment his own girls looks. One thing about Junior is that he is not afraid of being rejected by a girl he will simply move on with his life. Finally, when u don’t see him for a long time it means he is plotting lots of things that will make him succeed in life and will curve people if he has to.
“Junior is a cute dark chocolate
by Teddybear569 February 16, 2018
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the exhaustion and laziness caused by the overload of work from junior year
"I have such bad senioritis, I just party all the time in the weekend."

"Yeah, well I have to finish 3 projects to finish, 4 essays to write, and 2 tests to study for. I think I might pass out later from junioritis."
by simplybeachy14 September 29, 2011
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A guy who thinks he is the shit. Thinks that smoking weed and going to jail a lot makes him cooler.lies to girls,plays with them,and after getting what he wants from them leaves them. He is alright looking,not the best. Always gets in trouble and is fake most of the time.
Jessica: omg junior is talking to me

Brenda: don't get your hopes up,he comes and goes.
by Stargirll March 04, 2012
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The state of having no free time due to excessive amounts of work.
Each year, 11th graders at William G Enloe High suffer from extreme junioritis, which often makes the students unable to sleep
by squab July 31, 2006
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Junior is also a slang word used in Asia and UK for dick or penis
I like to play with junior before I go to bed!
by gwmsg September 28, 2009
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hes a little bitch and hints the word little because hes like 3 foot tall
wow hes such a Junior
by sprite14 November 11, 2015
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