If you want lose weight without working out then you need to concentrate on diet. First of all, have 10-12 glasses of water everyday. Have small and frequent meals. Include high fiber cereals like oats, wheat bran and ragi and jowar etc. A 3 serving of fruits daily. Increase your salad intake. Don't starve yourself or don't skipped meals inorder to lose weight. Have light dinners like grilled vegetables, soups and salad or grilled chicken. fish and salad.