a benny
A person who doesn't know what a beach is. They show up and act like they're in a desert.
My friend showed up at the beach. He said he was a benny. I said he was a desert rat.
My cousin showed up at the beach. She said she was a benny. I said she was a sand person.
My brother showed up at the beach. He said he was a benny. I said he was a hot dog.