The get stoned/drunk or just generally fucked up in a very shady way or to get fucked up in the woods of Maine.
Man I was so waterdogged yesterday.

Yo you wanna go waterdogging later today?
by Sanderwisemantardiff August 21, 2009
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A waterdog is a penis that is "semi" or "begining to become" erect.
I started to get a waterdog thinking of Ali and Ro, they are delish.
by D-burger January 22, 2007
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