Smashburger BOGO Entree Coupon December 19, 2017 By: SMFMcommentShare The Savings! Score a Buy 1 Get 1 FREE Entree at Smashburger! Simply print this coupon or show it on your phone to redeem! There is a limit of one coupon per person, and it cannot be combined with any other offers. Go here to find a Smashburger location near you.