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A memory stick or card which is used for the exclusive transportation or storage of porn.
Jim: "Dude, is that a 16GB mammary stick you've got there?"

Dude: "Sure is. 16GB of the finest boobs the porn industry has to offer."

Jim: "Mammtastic!"

Dude: "You got it..."
by Doggstarr September 08, 2009
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