superfat adjective 1noun 1verb 1forms 5 adjective1 •(informal) Extremely obese.In workshops extraordinary scenes would unfold, for example the superfat Apple Hard turned a cartwheel, […] — 2016 noun1 •(informal) An extremely obese person.Superfats take on more drastic risks in their body positive activism, in return for very little benefit for themselves. — 2018 verb1 •To use excess fat in soapmaking to consume the alkali and give the soap a more moisturizing effect. formssuperfatted · superfatting · superfats · more superfat · most superfat