Top Definition
The Seattle Seahawks' dynamic fan base. Regarded as the unrivaled loudest, proudest, most enthusiastic fans in the history of the NFL.
The 12s were in full force at Super Bowl 48; their crowd noise caused the safety to open the game because the Denver Broncos could not hear the snap count.
by Pooh Harrison February 03, 2014
20 Words related to 12s

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