benny is the northern/central nj term for a tourist/summer resident. always derogatory. it's an acronym standing for bayone, elizabeth, newark, & new york, which are the communities from which most summer visitors to lbi, seaside, belmar, etc. tend to hail.
"shoobie" is the southern nj equivalent. this one stems from the days when tourists used to ride the train from philly & bring their lunches in shoeboxes. this is used brigantine south to cape may.
or you could've done a search & saved me the trouble.