What is Al-block?
The distance of a normal city block multiplied by 10.
A mall is two Al-Blocks from my house.
A way to trick people into walking for a great distance by understating the distance it takes to get somewhere.
Yo fool, lets go get some pizza, its only 2 Al-Blocks away! (meanwhile, the pizza joint could be a good 3 hour drive away if its "only" 2 Al-Blocks!)