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A style of sex where people flop around on the bed, floor, beach, and on top of each other like a bunch of grunion fish. They proceed to ejaculate all over each other and all over the room with their bodily fluids.
My girlfriend and I always wanted to have sex on the beach and when we got there she wanted to try grunion style so we got naked and started flopping on top of each other. I busted so hard like a fountain and the semen covered us both.
by FishSexer March 30, 2009
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