Smashburger $5 OFF $12 Purchase Coupon September 1, 2015 By: Tricie share Smashburger is offering $5 OFF a purchase of $12 or more with this coupon! Limit 1 coupon per person per visit, excludes alcohol. *exp. 9/13 Print Grocery Coupons HERE before you go shopping! Be sure to find me on Facebook and “LIKE” the Page! Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.