Outback is giving away a free Bloomin' Onion with any purchase today only, 2/4, to celebrate the Super Bowl! Just say "Super Bloom" to your server and you'll get a free Bloomin' Onion with any purchase. There are more details on their Facebook page.
There is no coupon required and it is good with any purchase (which I am guessing includes a drink). One per table. Just make sure you ask for it and mention "Super Bloom."