interjection

1. sound noting confusion or disbelief
2. Posing the question, "what is going on."
Etymology: Likely to have come from Scooby-Doo often reacting to the order to go search for ghosts with Shaggy. Picked up in the late 90s.
Hot Girl: He wouldn't let me give him a blow job.
Guy: Aru??! He what!?

Bill: Come here, Joe. We need your help.
Joe: Aru?
by Monk of Justice March 27, 2005
Dental slang for a puscious cist causing obnoxious gasses to be emitted from the mouth. The odour can often overwhelm those around them causing feelings of nausia or excessive acquiescence.
Careful, the guy waiting in room three is an Arus.
by CptUndies August 9, 2012
The most amazing footballer you will meet. Very Athletic, sexy and cute
Girl: He just scored a hat trick!
Other Girl: He must be Aru!
by MessiRonaldo March 15, 2017
A God who lives amongst the humans of Ghoul Amino.
What are they? An Aru?
by Nimaru April 13, 2017
Aru is the sound a sad doge makes. Aru is also used for stubborn people who are just uncontrollably sad for no apparent reason and makes the environment of their surroundings also SAD which leads them to be hated most of the time.
Lfrd: Yo Juan , you wanna come with me to club later?
Juan: Nah man , the girls won't want me

Lfrd: cmon dude it'll be fun trust me I'll help you with them too
Juan: nah man then I'll seem like a bitch
Lfrd: oh well suit yourself
Juan: but yo you got fi-
Lfrd: *hangs up phonecall*
Juan: Aruuu
by Peepeerogers February 29, 2016
To be awesome. To be weird. To original. Creepy a lot. Be the person your sister might call the cops on for stalking. The requirements to be this is that you have to love movies, video games, ANIME, and everything geeky, nerdy, and an otaku
Hi, just to let you know, I'm Arue.
by Mr. Space Dandy May 18, 2014
Ahhh, `Arued, a popular race in FFXI called the Taru Taru, and thier dialect is ... well has aru on the end of it, so yeah...
EG: "I will killARU you with a hammeraru"
and the name Mikaru...(!)
"Eat this piearu!"
"eww, you were splattearued!"
by Lantilong March 27, 2005