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Creating a peice of merchandise with the branding of the Thundering Herd Ultimate Frisbee Team.
This is considered to be one of the most Herdcore things that you can do.
If you were wearing a t-shirt with the Herd logo, a person could say "wow, that is a really really fly peice of Herdchandise"
by AidanJones July 12, 2006