The two crossword solutions for the term BIG NAME IN FAKE FAT are Olestra (7 letters) and Olean (5 letters). Olestra and Olean are both fat substitutes created by Procter & Gamble in the late 1990s. Olestra is a synthetic fat that is not absorbed by the body, while Olean is a modified form of vegetable oil. Both products were designed to reduce fat and calorie intake in food products, but have been criticized for causing gastrointestinal problems.