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(noun) An overweight or obese male that in spite of his physical condition is sexually appealing, especially to fit, attractive members of the opposite sex.

(adj) describes an overweight or obese male that can attract beautiful women with charm, intelligence, or character.
"John hooked up with ANOTHER girl from the club. He weighs 80lbs more than me and has had four dates this month. He is obeast."

"What an obeast. I can't believe that chubby dude is making out with that hot chick."
obeast by piscesdreamer July 3, 2009
A fat person who, instead of being gluttonous and/or lazy, they are productive and usually inspire others to be like them, or do things like them.
"Oh, my gosh! That fat man just did a backflip on a skateboard while performing CPR on an infant while taching the elderly how to do the bernie! He's so OBEAST!!!"
Obeast by Smurphlicious October 23, 2011
A horribly fat and ugly person. It is a combination of "obese" and "beast."
Hey look it's the fattest girl in the school. She's a real obeast!
Obeast by Slippy Slippy Sir February 3, 2013
A very muscular individual who has a BMI of greater than 30, but maintains less than 10% body fat. Mass for this individual is located mostly in the skeletal muscle tissue although the BMI scale categorizes them as obese.
Frank: "Dude, I'm so fat! My BMI is 35"
Steve: "Nah dude, you're solid muscle. You are totes obeast!"
Obeast by FattyMcBlunt420 August 31, 2012
as is "Oh" Beast or "Orgasm" Beast or the Big "O" Beast.....a woman driven to maddness in pursuit of a/many orgasm(s)....She will destroy your cock in her quest for the Big-O!
My ex-girlfriend is and obeast, she road my dick till it bled.
obeast by Adair February 24, 2005
(pronounced oh-beest)

1) a mix of the words beast, in this case really good at something, and phat. Someone is very proficient in something.
Hey man, my wide receiver is so good, that he's obeast!
obeast by sowutifimuglt,ugly! January 21, 2007