In interviews she refers to her fat as "blubber." [1]

She's a fantastic writer too, I found this piece she wrote from the New Yorker, definitely worth a read[2]

[1] https://www.cbsnews.com/news/how-body-fat-helps-this-elite-a...

[2] https://www.newyorker.com/magazine/2008/04/21/a-dip-in-the-c...