Translation:I am fat.
There's a popular chain of diners in Korea that serve 족발, which is called "뚱뚱이 할머니" (fat grandma). First time we walked by a location in town, I thought I was reading it incorrectly until I noticed that their advertising photos outside were, in fact, of a smiling fat grandma.
Well, living in Korea for a few years, I've found that Korean folks can be pretty blunt with this. Many of them will straight up tell you if you got fatter.
And similarly, it's a common insult to refer to heavier people by "돼지" (pig), even though I feel like it's even more offensive that something like 뚱뚱해/뚱뚱한.