A line of guys who enjoy the company of other men. A sort of leap frog of sex if you will. The man in the back is the pitcher and the person directly in front of him is the catcher... he is also a pitcher for the guy in front of him. The men alternate from a standing to bent position engaging is homosexual activity.
I walked into your dads room and saw him in the middle of the gravy trian smiling and laughing.