1 definition by tacocatisapalindrome

Top Definition
The knock-off Under Armour, usually purchased at Wal-Mart.
Craig - "Yo dude, I just got this new Under Armour shirt at Wal-Mart!"

Paul - "Nah dude, if its from Wal-Mart, its Thunder Armour."
by tacocatisapalindrome October 22, 2010

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