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1.
The superfans at concerts who mysteriously appear wearing a brand new t-shirt from the merch booth with no sign of the shirt they originally wore into the venue.

OR

People who wear the concert t-shirt the very next day as if to appear cool and elitist.
"Look at all these people wearing the band's t-shirt at the show. They are such conshirts."

OR

"Guess who saw Def Leppard last night? They are complete conshirts."
by Andy Poncherello October 10, 2008

Words related to Conshirts

concerts def leppard show superfans t-shirts