Is there a way to lose 4 inches off my waistline in a week without considering exercise?

Cardio Mix: This is a very short time frame for such goals. If you adipose tissue that you'd like to lose then consider an increase in cardio and a balanced diet. However, do not always do the same exercise or you will increase your risks for stress injuries. Mix things up with running, biking, swimming, or circuit training. Ultimately you need to burn more than you consume.

Not impossible: Not impossible, just not recommended. Is there a reason you can't exercise but need to lose 4 inches off your waist? That's a dramatic change and usually takes starvation and unhealthy methods for temporary results. A simple diet and exercise are still the best methods for proper weight loss.