Sandy Pancakes is a playful, mischievous prank where someone slaps another person on the ass, with or without pants, after covering their hand in sand. It’s a mix of surprise, laughter, and a little bit of beach-inspired jokes, however it can also be used under sexual pretenses if the two are in a romantic relationship and love the beach and sand.
Person 1: Yeah so I just gave my wife some sandy pancakes, she loved it.
Person 2: Really? I guess I'll have to do the same when I get a wife.