The term 'LOSER's Regimen' refers to a DIET plan that is designed to help people lose weight. It typically involves reducing calorie intake and increasing physical activity. The crossword solutions for the term 'LOSER's Regimen' include the word 'DIET, ' which is a four-letter word meaning a specific selection of food to be eaten, usually with the intention of losing weight or maintaining good health. This type of DIET is often used in combination with exercise to achieve desired results.