Synopsis from Goodreads:
Self-proclaimed fat girl Willowdean Dickson (dubbed “Dumplin’” by her former beauty queen mom) has always been at home in her own skin. Her thoughts on having the ultimate bikini body? Put a bikini on your body. With her all-American beauty best friend, Ellen, by her side, things have always worked…until Will takes a job at Harpy’s, the local fast-food joint. There she meets Private School Bo, a hot former jock. Will isn’t surprised to find herself attracted to Bo. But she is surprised when he seems to like her back.