Home Slickdeals Smashburger: Buy One Entree, Get One Entree Free Coupon – Expires 05/28/18 Slickdeals Smashburger: Buy One Entree, Get One Entree Free Coupon – Expires 05/28/18 By ARCOM - 28 May 2018 171 0 SHARE Facebook Twitter Go to the deal page: Smashburger: Buy One Entree, Get One Entree Free Coupon – Expires 05/28/18