Shoobie is a New Jersey, Delaware, and Southern California[citation needed] slang term for a tourist who visits the seashore for a day (a daytripper) or summer-only residents.
The term shoobie originated in the late 1800s, and it derives from daytrippers taking the train to the New Jersey beach, with their ticket price including a boxed lunch packed in a shoe box.
Either way, these daytrippers deprived local businesses of the revenue the tourists would have spent on food.
Homeowners (whether year-round or seasonal) often walk to the beach barefoot or remove their shoes immediately upon reaching the sand.
In that sense, shoobies are not unlike the tourists who visit any resort area.