The top four hate names were 'fatty', 'fat', 'lard arse' and 'fat b*****d', while other common jibes included 'porker', 'thunder thighs', 'Mr Blobby' and 'Ten Ton Tess'.
The survey involving 1,000 adults also found that such fat jibes were common among youngsters.
It said that weight-related name calling were "endemic" among Britons, with nine out of 10 overweight people experiencing it because of their excess pounds.
This negative attitude was shared by many of those who had felt the brunt of insults, with 33 pct of obese or very obese respondents among the name-callers.
Misguided banter could be why men were ready to insult friends and relatives in this way, with nearly a third (28 pct) doing so, in comparison to just 11pct of women.
The survey found that twice as many Londoners (30pct) called a friend or relative a nasty name compared to their Scottish counterparts (15pct).
"It's sad that adults now find such behaviour acceptable, and particularly so among the younger age groups, as they could well carry through these views as they get older, thus increasing the problem even further," the Telegraph quoted Mandy Cassidy, a psychotherapist with the weight loss specialist LighterLife, which commissioned the survey, as saying.
"Just because someone is overweight, it doesn't mean it's acceptable to insult them.
"This type of prejudice isn't tolerated in any other walk of life - so we shouldn't allow it here," she added.
Dr. Ian W Campbell, of the charity Weight Concern also expressed concerns over the survey results.
"These findings are very concerning. People who have a weight problem need support and encouragement, not ridicule.
"Few people want to be very overweight and most would love to be able to change. That process needs support, not criticism; it needs incentive, not punishment," he added.