These are typically Orthodox Jews who visit or live along the shorelines of New Jersey during the winter and then spend their summers in the Catskills, in essence staying in seasonal environments in unseasonal weather.
Goy #1: "I was driving around Hunter, NY in July and there were all these Orthodox Jews walking all over the place."

Goy #2:"Oh, the Jewish snowbirds? Yeah, you find them all over the Jersey shore in December."
by miyamoto02 January 22, 2010
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