look up any word, like cleveland steamer:
 
5.
A.R
A.R: Ass Rape. It's used in environments where profanity is not common.
Person: Wow this test is such an A.R!!
by H. Hassany October 30, 2006
 
1.
AR
Assult Rifle.
Commonly used to refer to the Armalite AR-15, which was later developed into the M-16. Chambered in .223 caliber, the rifle proves to be effective though somewhat ineffective. Today, a variety of manufacturers produce ARs in a variety of calibers.
"AR-15/M-16 Assult Rifle"
by .357ROB September 30, 2003
 
2.
AR
Alternate Reality - used in Fan Fiction for similar reality with different version of events, as where as AU Alternate Universe is different time & place
AR - Naruto becomes one with the demon & destroys everone instead of becoming the Hero

AU - Naruto lives in todays modern era and owns a restaurant
by GoodChaos March 14, 2010
 
3.
AR
Anal Retentive. Tight Asses.
This forum is full AR, tight asses.
by Hutch Topikian May 17, 2008
 
4.
AR
25th U.S. state. Pronounced Ar-kan-saw. Part of the 1803 Louisiana Purchase. Populous areas include Little Rock (capital), Fort Smith, and Fayetteville-Springdale-Rogers Metro area. Abbreviation is commonly mistaken for Arizona (AZ).

Contrary to a common misconception, not all Arkansans (or Arkansawyers) are hicks. Natives, residents, and former residents include Billy Bob Thorton, Johnny Cash, Daniel Davis (Niles the Butler), John Daly, Bill Carr, John Grisham, Maya Angelou, Don Tyson, Sam Walton, Glen Campbell, Lefty Frizzell, Al Green, Levon Helm, Tracy Lawrence, Amy Lee, Ne-Yo, Conway Twitty, Hattie Caraway, Bill Clinton, Daisy Bates, and Bill Doolin.
Person 1: I'm going to college in Arkansas!
Person 2: WHAT?! They have schools there?!
Person 1: Yes, and they wear shoes too!
by Squirrel Bait April 13, 2008
 
6.
AR
AR15 rifle
by VAKI5 September 25, 2003
 
7.
Ar!
symbol for the Big O and Dukes show on 101.5 Free FM from 8-12pm monday-Friday in Arizona. THE GREATEST SHOW IN THE WORLD!
if ur in theater or store or anywhere and yell out Ar! and someone returne the with an Ar! u know they are Big O and Dukes Fans.
by BsMoTo430 August 17, 2006