Also known as ball bag, sack or the skin which contains your two vege (testicles). Man Chicken is the part of a man's tackle that looks like raw chicken skin.
Can be used as a comeback to "your mum" by saying "your mum's man chicken"
andy: work shy
murray: your mum's work shy
andy: your mum's man chicken is
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.