The Zero-Zero is type of hash from the ME (mainly Morrocco, buy I've seen ZZ grade from all over the region).
It's called that because all it takes to get stoned off it is .009th of a gram.
Feel free to flame for this, but that hash was the best remedy for insomnia and IBS. Any time I hear a remotely ME accent say the word zero, I wait around to see if zero is said afterwards.