Answer: fluffiest

AnswerCrossword Clue
fluffiestOf, like, or covered with fluff
fluffiest(of food) Light in texture and containing air
fluffiestFLUFFY, downy, light and soft
fluffiestLacking substance, depth, or seriousness
fluffiest(of a person, esp. a woman) Frivolous, silly, or vague