-slang term referring to the male sexual reproductive organs
-in most cases, it is the equivelant of 'ballsack', 'nutsack', 'sack', 'bag', 'beanpack', or any other term referring to the scrotum and it's contents.
In a fit of rage, Karen kicked Allan in his bolpak.
As a practical joke, Ryan suprised Adam by arranging his bolpak to look like a brain.
The little children laughed at the old man's massive bolpak.