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AOS

Short for "Age of Shadows" - the version of the popular online MMORPG Ultima Online that moved focus more onto what items the player has in his inventory than his actual skill.
Ultima Online: AoS completely took away any skill involved whatsoever in PvP combat.
by Ultima May 26, 2004
mugGet the AOSmug.

AO

AO = All Out. Its the hip new slang way of saying All Out. It was made popular when Ethan of HG added it to his vocabulary. And now all the cool kids at school are saying it.
"Dude, that move was f*cking AO!!! You shot them all in their faces."
by The Most Hated January 20, 2005
mugGet the AOmug.

AO

A reference to the Bum-Bum, Anus, Ass, Brown-Eye, etc.
Stick that shit up in the AO!
A-OoOoOoOoOoOoO
by Gringey Jam March 5, 2005
mugGet the AOmug.

AO

After Obama
I've been sick for 2 days; is California slowly poisoning our food so we don't have to witness life AO?
In the year 2018 AO, many middle aged people avoided receiving preventative medical care and diagnostic testing due to the incredibly high costs of insurance premiums.
by Poliskia January 18, 2017
mugGet the AOmug.

AO

A person who is extremely hostile, and prone to attacks by religious fundamentalists and football players.

AO's are usually bald and lonely, and prone to fits of rage (See: Maldy Agre).
"Why hello AO, have you seen the new religion topic?"

"RAWR ARGH CLAW SCRATCH HOSTIEL /part"
by Polaris December 10, 2003
mugGet the AOmug.

ao

All Over. When someone is clingy towards another person, esp. when the other person isn't interested.
I saw Jimmy the other day down at Rock-ola and his ex was AO. She was pathetic.
by ghost July 31, 2003
mugGet the aomug.

AO

a person whose favorite activities include going to the gym, playing tennis, binging/purging, and cruising men's restrooms at UCLA
the guy in the sleeveless pink muscle tee blew AO through the glory hole
by lb627 November 10, 2008
mugGet the AOmug.

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