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This is east coast Jewish slang meaning to "look' or "shop" in a store, business or any place where goods are for sale without buying.

"Shmyer" also can imply being a "bottom feeder" or one that is always looking for sale items and is not hampered by any guilt to ask to purchased an item for below bargain or advertised prices.
"Hello, may I help you?". "No that's OK, I'm just shmying around."

" What did you get at Macy's?" " Nothing I just went in to kill time and shmy."
by SeaPilot June 25, 2009