fappy /ˈfæp.iː/ adjective2 •(slang, vulgar) In the mood to masturbate. •Overweight and fortunate with one's life.I actually returned to WW [Weight Watchers] 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. — 2013 formsfappier · more fappy · fappiest · most fappy