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When one sneaks into the bathroom while another person is showering and takes a shit; the person showering is less likely to hear the perpetrator's entrance, allowing for the perfect opportunity to attempt a sneaky dan.
"dude should I go in there and shit while Kyle is in the shower?"

"you're gonna give him a sneaky dan?!.... thaaat's greasy."
by ya gurl's bush October 11, 2015
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2
the act of getting to third base or higher with two different girls in the same night.
doing a sneaky dan is fucking AWESOME
by achillman0688 October 29, 2010
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