Being fat or think is a strictly relative comparison.
A person is considered fat when he seems to occupy more space than another person. This includes having a larger stomach, butt, chubby face, fat legs etc...
However being fat or not is not something a person realized on his own. When people who had seen you a long time back find a difference in your appearance, or size they tend to comment on it, which makes us realize that we are fat or thin. And as mentioned before, there is no strict reference. Often it so happens that we are compared to the people around us, to conclude if we are fat or thin.
Lets look at a scenario where there are 8 people sitting in a row and a person behind decides to judge if they are fat or not.
We can see here that when comparing 2 people, their fatnesses are of no significance only the difference of their fatness matters. Our mind makes an average assumption of the actual fatness and it can be seen in the black curve that the less fat people appear to be fat when amongst fatter people.
The method of averaging can be tracked on proper analysis, but i have made no such effort. It can be one of straight-line method, simple average, weighted average... or any of such methods.
To be on the safer side, make sure that if you are a fat person, then you sit next to a fatter person because as the graph indicates, your relative fatness will make you look thin.
Suppose you are a very thin person and if you want to look a bit fat, then sit amongst people who are just slightly fatter than you.
Though the final opinion of the people will very when you change the group, it still leaves an impression which you can bank upon in future encounters.
After you have read this blog, make sure you try to look at what you consider youself to be, and how you came to such a conclusion. And tell me what you can relate to.
Yes this is perhaps the most useless blog I have written as on now, whatever opinion you have on this topic, please put it as a comment. (TY)