As men we store most of our excess fat on our waist because we have a lot more fat stores in this area. Having a large waist however can increase the risk of heart disease, breathing problems and cancer. However this doesn't just apply to men, women who has a waist size above 37ins have approximately a 5 year lower life expectancy. Control your waistline by paying attention to what you are eating and making sure you exercise enough.
Reference - Daily Mail - http://www.dailymail.co.uk/health/article-2659959/Having-large-waist-knock-5-years-life-BMI-healthy.html