"that strange pipe used by the Arabs"
by cm

Creative Commons Attribution Share AlikeHookah - Credit: Zunami, Flickr
A hookah is a large tobacco pipe, commonly found in the Middle East, Turkey and North Africa, incorporating a jar of water through which the smoke is drawn to cool it.  Hot coals are used to burn the tobacco, which is often supplemented with a fruit flavour.

Originally from India, the pipe is also sometimes referred to as a shisha, narghile or a hubbly bubbly.