plum bucket
When one is way past the term "muffin topper". The fat actually go through the spandex pants, not just over.
Person 1: Ohh crap, that guy gained hella weight.
Person 2: Yah last year he was a muffin topper, now he's the whole plum bucket.
Person 2: Yah last year he was a muffin topper, now he's the whole plum bucket.