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A person that has gone beyond severely over weight. A person characterized as having a beast-like magnitude in height-weight proportion.

Also, someone who moves similar to a wild animal due to their condition. This may elicit fear or shock in those he / she comes in contact with.
John: "Did you see that guy?!"
Tim: "Yeah that guy was obeast!."

Doug: "Kelly, slow down on that hamburger before you become obeast!"
by StoryStellar February 24, 2011
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when someone is obscenely fat
if your mass is equivalent to that of a forklift, then damnn brotha (sista), you gotta be obeast
by mike November 27, 2003
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Something so large it is obese to the point of being beastly.
"That dude is obeast!"
"Did you see that obeast sandwich he was eating? That thing was fucking huge."
by Zebra Operating Electronics August 30, 2007
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unattractive female; physically gruesome. a combination of obese and beast. Must have a few characteristics of a wild animal; snaggletooth, venom, or fur. 350+ LBS. No attractive attributes must be present to qualify. Mustache BONUS!!
Remember that ugly ass chic that lived down the block, well she got maaaaaaaaaad fat. That bitch is OBEAST now!!
by sir deacon May 18, 2009
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Severely overweight woman with any of the following :
1) Thick facial hair
2) Hairy chest
3) Fucked up Grill (teeth)
4) Wears bedsheet size clothing
5) Has her own gravitational pull
At the club today, did you see that nasty ass OBEAST!
by Baro, J', Javo May 07, 2003
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A mixture between obese and beast. This new word has to be created to describe the ever growing American nation. Therefore Obeast = American/s
Can also be used as Obeastest.
Woa man, look at that obeast person!
by Not fat person January 11, 2006
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A funny way of saying someone is severely over weight, or morbidly obese.
Bob: "Holy shit! You see that woman over there?"
John: "Yeah, she's o'beast!"
by TweedleD January 02, 2009
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