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A word formed by combining "wordOtaku/word" and "Convention". Dr. Hal Emmerich, the engineer who was the team leader in the Metal Gear Rex project, uses this word as his nickname.
Call me Otacon.
otacon by FROGGER June 17, 2003
Related Words
A music genre made up of songs heavy origins or basis in fan communities, such as those for anime. A large portion of this genre is made up of J-Pop.
My buddy: “The hell is that”
Me: “Otacore. It’s basically anime music”
Otacore by moshpitfuneral December 6, 2019
The partner of ex-US soldier Solid Snake in their international anti-terrorist activities. Otacon provides operational support, while Solid Snake physically executes the missions. Otacon's real name is Dr. Hall Emmerich. He first appeared in the video game Metal Gear Solid.
"Are you there Otacon? This is Snake." -Solid Snake
otacon by Nicolai July 2, 2004
combining the words "otaku" (as in someone who likes anime and sci-fi) and "convention" (as in a gathering of people under one base intrest... mostly nerds). the name of a conneticuit based sci-fi/anime/comic convention, that was used as the alias of Dr. Hal Emmerich in the metal gear solid series of games.

although otacon is an invaluable sidekick and amazing hacker for solid snake in MGS, he's a pants wetter and a bit of a crybaby.
guy 1: d00d LOLOMGWTF???!!!1111one! i'm lyk going 2 cosplay @ teh Otacon dis year LOLOMGWTF?!!!

me: really? i'm gonna sniff coke off the blade of a knife.
otacon by tofubot November 4, 2004

otcomplexia 

Mental-complex in which the afflicted finds a need to make up stories to impress people he/she does not know if online formus.
That guy is such a loser with the biggest otcomplexia complex. Check out his latest post:

So yeah rough week and i need to spend a week away from home, so i move my biz to a hotel a mile down the road, very decent hotel.

I go to take a shower, unwrap the soap, no problem, wash the cash and prizes and all that jazz, and then go for the little hotel shampoo/conditioner.

I notice that the seal didnt break when i twisted it, and that it was light, it wasnt full.

I fastly dump the remaining contents into my palm, and for the facking life of me.... i chit you not, the LAST thing that it was, was shampoo. something out of an American Pie scene or something, no fun finding shamspooge in your hotel.

discuss
otcomplexia by buriedinsounds August 3, 2006
A person that happens to be an otaku and have a love for tacos.
Ching: Are you an Otaku or an Otaco
Chong: Im and Otaco
Otaco by krayuk February 23, 2017