"Liverwish" sandwiches? (New Jersey-isms)

Over the holidays, was surprised and very amused to hear, at the Trenton Farmer's Market, a woman ordering a half-pound of "Liverwish".

It brought back memories of classmates in grammar school saying it like that, but I didn't realize it was a regional term used by some adults too! Any other experience with this?

(By the way, the liverwish sand was delicious on rye toast with onion and mayo -- probably hadn't had one in fifteen years.)