How can I lose 100 pounds in 6 weeks?

Theoretically... If you will need to burn an extra 350, 000 calories over six weeks to loose 100lb. This equates to running give or take 2, 000 miles in six weeks. Great theoretical exercise.... But this sort of weight loss is impossible. Did you mean 10 pounds over 6 weeks?
Unhealthy. While I congratulate you on your recognition of need for weight loss, and you don't indicate what your current weight and height are, there is no medically safe way of losing such a large amount of weight in so short a time. Bariatric surgery can provide the amount of weight loss you are interested in but not in 6 weeks. Please consult your doctor before starting any weight loss plan, .