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San Diego Sandcastle, noun; When a couple goes down to the beach, makes love, and the man finishes by spraying his natural sand-glue on the lady's naked boobs. The couple then finishes by building two sandcastles, one per boob, with the boobs and sand-glue as a foundation.
Dude, last night that hooker slut Tori and I went down to the beach and I totally gave her a San Diego Sandcastle.
by NotYourAverageLunch January 15, 2013
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