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1.
an acronym for Asshole of the Day, a daily award given to the person who has been the biggest asshole in the past 24 hours. A number of behaviors can win one AOTD. These actions include but are not limited to: being an asshole, raw dogging, ditching your friends, driving drunk, performing a bus flip, and wearing sunglasses when it's cloudy and overcast. Not to be confused with AOTW (Asshole of the Week): a highly coveted award among assholes everywhere
After getting drunk and raw dogging someone else's girl, he was awarded AOTD.

You're in the running for AOTD right now!
by thsgeneral June 13, 2010
 
2.
Ass Of The DAY... in other words, the BEST woman's ass of the day :-)
Damn dat girl's got the AOTD!!!
by Soup16 September 26, 2012
 
3.
Army of the Deranged
No, we are not recruiting...
A.O.T.D. Senior officials: Helmut, Meathouse, along with several of our agents in America. Others throughout the world are watching you.
by Manwich November 03, 2005
 
4.
An acronym for "Avatar Of The Day".
"Your Avatar sucks. Why don't you go check out the AOTD?"
by LeJitta May 22, 2007