Senioritis is a disease that affects approximately 95% of the senior population during their second (and last) semester of high school after receiving acceptance letters from the colleges/unversities of their choice. During this time, affected persons may experience lack of motivation, a major decline in fucks to give, and a burning passion to get the hell out of high school.
John: I haven't handed in that Biology assignment yet.
Mallory: That was due 3 weeks ago!
John: It's not me, it's the senioritis.
Mallory: That was due 3 weeks ago!
John: It's not me, it's the senioritis.
by princess787 May 21, 2017

A disease that affects high school and college seniors in the second semester symptoms include bad decisions, laziness, constant tardiness, lack of studying and in rare cases even use of drugs I. E. Pot
by @Chickentastesgoodlol March 25, 2016

Noun. A crippling disease that strikes high school seniors. Symptoms include: laziness, an over-excessive wearing of t-shirts, sweatpants, athletic shorts, and sweatshirts. Also features a lack of studying, repeated absences, and a generally dismissive attitude. The only known cure is a phenomenon known as Graduation.
by Jordannnk January 4, 2016

When seniors pass first semester and start not giving a shit second semester cos they know they made it and theyre going to graduate. Only cure For this is graduation day
by maccaronitoni November 26, 2014

1) A slut. One of the biggest whores you have encountered in your life thus far
2) The last year of high school, when all hell breaks loose and morals are no longer an issue (at least until you start college)
2) The last year of high school, when all hell breaks loose and morals are no longer an issue (at least until you start college)
1) Oh my god! Kim is such a senior. Cutie & her totally sucked each other up last night. And this morning. And OH MY GOD, LOOK OUTSIDE! THEY'RE DOING IT RIGHT NOW ON YOUR LAWN!
by Bachelors Masters & Citizens February 1, 2009

when in marching band, the seniors get first pick on anything and everything just by calling out the simple phrase "Seniority!"
Sophmores and Juniors are usually accustomed to this power, however some freshman like to put up a stink about it.
Sophmores and Juniors are usually accustomed to this power, however some freshman like to put up a stink about it.
Senior- This water line is sooo long! I think im gonna use the seniority card.
*taps freshman in front of him*
Cool Freshman- whats up bro?
Senior- We are gonna play a game called Seniority!
C. Freshman- Damnit I always loose that game! How did you get so good
Senior- hahaha sorry tho im really thirsty
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Senior- Seniority!
Douch Freshman- I don't think so, thats not fair.
Senior- Suck it. *steps in front*
D.F*goes and whines*
*taps freshman in front of him*
Cool Freshman- whats up bro?
Senior- We are gonna play a game called Seniority!
C. Freshman- Damnit I always loose that game! How did you get so good
Senior- hahaha sorry tho im really thirsty
------------------------------------
Senior- Seniority!
Douch Freshman- I don't think so, thats not fair.
Senior- Suck it. *steps in front*
D.F*goes and whines*
by Jbean13 August 17, 2010

Your last year of high school. Though these upperclassmen deserve respect, they demand it like assholes, and are treated by the other classes as such.
by Brian Myers December 29, 2007
