An "Arabian Sand-Storm" is basically another trick to play on your mates when they are passed out. It consists of putting a testicle in both eye sockets and flatulating in the recipiants mouth, giving them a dry mouth, bad breath and a furry pair of testes in their eyes for when they wake up.
Mitch: Holy Macrel Gav Is Passed Out From Excessive Drinking
Bundi: Why Yes He Is Mitch, Perhaps We Should Do Something Of Comedical Benefit To Further Extend The Laughs We Had Tonight!
Angus: An Arabian Sand-Storm Would Be Ever So Hilarious...