In days of old when we wore "Battle Dress" my BD Blouse never quite managed to stay over or even in contact with my trousers, despite the provision of buttons designed to hold them together. The bit of one's body that stuck out in the gap was referred to as a "Beer Gut".
At the time, certain WRAF personnel wore trousers identical to those that we chaps wore, apart for the absence of a fly. I believe WRAF trousers were issued to enable those poor girls who had their legs put on backwards to cover up the damage. Beer Guts are, or were, slightly less unsightly than back to front legs...
