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Vomiting out the window of a moving vehicle onto someone's yard.
"Man, I was hammered last night. I did a lawn sprinkler on the old lady's house down the street on my way home!"
by DavieYo February 26, 2015
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A female reclines on her back, pulls aside her shorts/skirt & panties, spreads lips and waters the lawn (urinates) sending a stream of pee over a distance.
While at the park, Michelle couldn’t make it to the facilities so she just sat & did a lawnsprinkler.

Heather and Diane had a contest to see who could do the longest lawnsprinkler.
by pendraggons November 22, 2009
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