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When a girl scooches up and leans with her legs open toward the faucet in the shower and turns the water on, creating an awesome feeling in the whole cooter region. Combines "waterfall + "cooter," and is often first discovered by younger girls in their baths.
"I was really horny when I was a kid, so I ran a cooterfall until I had a cootergasm."
by Programming Sapien April 03, 2015
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