Jug Mugging
To whallop someone violently about the head with one's jugs.
She gave him one hell of a jug mugging. And it was good.
Milk Jug Mug
A common gang sign for marking territory or a threat. Gang members will chuck a milk jug at you as a sign that they will get revenge/reclaim their territory.
I got milk jug mugged by the Chicos Piceños