Thunder Armour
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."
Paul - "Nah dude, if its from Wal-Mart, its Thunder Armour."