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To wear a plain white t-shirt. Derived from the original founder, Mark Cohen who wears nothing but a white tee every day.
"Dude you're wearing a white tee? Looks like you got your cohen on"

"What are you gonna wear tomorrow"
"I don't know i'm probably just gonna get my cohen on"

"Dude, what are you doing? Get your cohen on like the rest of us"
by jewduh November 18, 2011
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