Shirt twin

The person(s) you see during the day that have the same shirt on as you.
"Man, I saw seven shirt twins today!"

or when you see a shirt twin: "Dude! shirt twins! high five!"
by sregoRrM September 17, 2010
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T Shirt Twins

Dang she's got some big T Shirt Twins
by SanchezMcdaniels March 31, 2010
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