December 2, 2010 No Comments Free Onion Rings at Whataburger on Friday Print out the coupon and redeem for a FREE medium onion ring at Whataburger on Friday, December 03, 2010. Coupon valid only on December 03, 2010. Free Onion Rings at Whataburger on Friday – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.