Reverse Colgate challenge

the act of inserting a flaccid penis into an anus.
I was so wasted that I couldn't even get it up. I had to settle for a reverse Colgate challenge.
by jefeefefefe February 18, 2010
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Colgate challenge

The act of pooping out a flaccid penis.
He fell asleep on top of me when he was done, I gave him the Colgate challenge and snuck out.
by jefeefefefe February 18, 2010
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