Millwall Brick
Originally created by MillWall fans a "Millwall Brick" is a newspaper rolled up lengthways and then folded in the middle creating a solid square end. Held correctly can be as damaging as a brick. Another use for this is taping the end and attaching a piece of string to the end and the swinging it around, this can cause a great amount of damage as it is very light but as hard as a brick.
"i'll smash him up with a millwall brick"