Dave, I didn't know that you liked to get wet!
--Wayne Brady, on The Chapelle Show
In addition to the numerous, much more obvious definitions listed above, "water" is also a slang term for Phencyclidine (PCP), sometimes called "Angel Dust"; it is sometimes a synonym for amphetamines, in a likewise manner. The etymology behind this term is uncertain, although it flourishes in, and may have come from, the rave culture scene. Thus, when PCP is smoked, usually combined with tobacco or other illicit substances, phrases that imply the user being or getting "wet" are common connotations, such as that in the quote above.