look up any word, like ratchet:
 
3.
A good way to type the word arse but no one will know what you're typing. Also when you say the phrase its quite a lot funnier than saying arse made even funnier when you're old enough to say arse without getting told off, and youre friends think youre being sad, the same result as when you use mummy daddy bone. Also gives the advantage of sounding like youre saying arse in an irish accent.
"ooooooooooooooow!! you got me right in the arus"
"chris Man grow up you're 45, and you're not even bloody irish!"
by christopher lynch September 24, 2005
 
1.
aru
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 26, 2005
 
2.
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 08, 2012