The fattest man to date is Manuel Uribe. He weighed 1225 lbs at his max, but has recently got surgery, and that weight has went down to less than 900 lbs. He plans on bringing his weight down to 200 lbs.
[Answer subject to change]
1267lbs
The heaviest person ever recorded was estimated to weigh around 1,400 pounds, which is approximately 100 stones.
Ryan Green
the fattest person ever weigh 8,451 lb.
300,000,000lbs
The fattest rabbit ever weigh so far was 22 lbs.
The world's fattest and biggest horse was a shire called Samson. He had a height of 21.25 hh and weighed 3,360 pounds. He was foaled in 1846.
The world's fattest cow lives in Shepherd, MT and weighs well over 4500lbs!!!
9 pounds
Due to privacy laws and lack of real world data this infomation can not be obtained.
1200 pounds
1267 pounds!