1: (n) When one is in a state of love or deep longing for another person physically. "Going out" with somebody. This is usually due to the yearning for another person in one's life, not for the actual liking of one person. Commonly known as "Drinking the Devil's water" or "Bathing in the Devil's water". It is called "the Devil's water" because of the fact that lust and sex are sins.
2: (n) A river in Northumberland, England.
"My 11 year old sister has friends with boyfriends, now she thinks she needs one!"
"Be careful, you wouldn't want her drinking the devil's water too early."
"Have you been to Devil's Water in England?"
"Why would I go there? That is just a small tributary."