One of Evreward's most popular merchants since 2016, Nasty Gal offers coupons, cash back rebates and rewards, with savings as high as 99% off. Nasty Gal discount coupons are seasonal, appearing every three to four months. Even when Nasty Gal doesn't have a coupon, you can always get up to 20% cash back, and other great rewards, with every purchase.