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a Shersey is a sports-related T-shirt that is designed to mimic an actual jersey. They are especially popular in baseball and general consist of screen printed logos on the front, and the players name and number on the back.
Me: dude did you see my new Alex Gordon baby blue throwback shersey?

Ben: thats gross.

Me: No way man, Sherseys are the shit.
by Taters and Ribeyes April 04, 2008