"Bennies Go Home!"
A Benny is anyone from New York or North Jersey (mostly guidos) who come to the Jersey Shore for summer vacation or just for the weekend. The origins of the term seem to differ with some saying it was from old italian men named benny who wore black socks with their sandals (or flip-flops, another regional term?) to the beach or that the tourists brought lots of money to the area and were therefore nicknamed "benefits" which shortened to "bennies"
I'm sure there are even more variations on the term but in any case: welcome to my beach, now go home benny!
I used to see a bumper sticker in VT once upon a time that read 'Welcome to Vermont, give us your money and go home'
We call them flip flops as well.