(形容詞) 胖得快樂的。這個字是由 fat + happy 組合而成。

I actually returned to WW after a 10 month hiatus recently. I met someone lovely who became my bf and I got fappy (fat + happy) but really more Fazy, basically.
—SassyFatFriend, "My daily points are 38. That's a lot. I actually...", Lose the Fat, Keep the Sass, May 9, 2013

The once buffed up Tatum was the first to say that he's "fat and happy" today as he is enjoying some "down time" after working for two years straight. His wife even has a name for his new look and demeanor combined. He is "fappy," which is short for "fat and happy," he explained.
—Roz Zurko, "Channing Tatum is one 'fappy' fellow: Tells Ellen why he's so 'fat and happy'," Examiner.com, February 7, 2014