Term for "the fatty" used by teenagers

"In seventh grade, I was diagnosed with scoliosis. My nightmare began. A brace restricted my movement and my life; I could not bend or turn, let alone continue with my favorite hobby—dancing. I was dubbed ___ for the baggy clothes that covered my shameful brace." (Self-made sentence in an essay)

I am looking for an insulting term to fill in the blank that means the fatty which is used by teenagers. I can only think of "the fatty". Either one phrase or one word will do.

Solution 1:

I am not quite sure how much teens use these kind of insults nowdays, but macmillanthesaurus lists some which I think would fit in your sentence, ex. lump, fatso, porker.

From the link, here are the definitions of some of the insults one in such case could use:

• lump: noun; someone, especially a child, who is heavy

• porker: noun, informal; an insulting word for someone who is fat

• fatso: noun, informal; an insulting word for someone who is fat