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A special type of wilderpee where one urinates in nature at a special view point.
If it wasn't for the port-a-potties just before the saddle, I would have had an epic precipiss at the top of Angel's Landing.

Given the prevailing winds, one should think twice before launching a precipiss off the South Rim.
by Senor Jaime Dos April 02, 2011
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To pee from a high ledge, platform, or other location where a vertiginous urine-waterfall will result.
Oh man, Dave and Buster's did me in last night; I ended up so drunk that I thought taking a precipiss from the third floor of the mall would be a good idea. Hope no innocent bystanders were injured.
by Sir Miles Long June 10, 2010
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