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Attempted penis enlargement done by men before they get into a community shower together in which they tug and play in an attempt to make it look bigger. Kind of like puffing out the chest.
Kyle: wow bro look how big that guys cock is!!

Rob: Haha holy crap!..wait a second i saw him yesterday while he was changing in the locker room it wasnt that big..

Kyle: Your'e right man. He's got shower dick!!
by Cretonious February 12, 2011
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