Not trying to sound mean but that's delusional.
If you are 50 lbs overweight you are fat plain and simple.
If you are 100 lbs overweight you are obese
300 lbs you are super morbidly obese
The best fat people own up to being fat without making excuses or blaming other people or things completely within their control like what foods they put in their body, how much they excercise and many calories they burn daily.
Always making excuses and never holding yourself accountable is pathetic.