Top Definition
When a couple is having sex on the beach, the guy dips the head of his wet dick in the sand, and then fucks the girl or recieves oral.

A.K.A. "The Margarita Glass" when done with salt.
"Dude, why is Paris Hilton walking all bull-legged and junk?"

"Last night in Malibu, that bitch got so drunk she let Ron Jeremy give her the Sandy Melvin."

"That stupid slut!"
by BDReeser August 15, 2007
5 Words related to Sandy Melvin

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