sexonabeach Share definition Flag 1. Sex...on a beach. 2. Babies. 3. Crack. 4. the password to my facebook. Dude, that is so sexonabeach. A baby beach?? God, Danny you are on crack. The babies are on crack?!? sexonabeach by sexxyback November 10, 2006 Get the sexonabeach mug.