Kevin Murphy Killer Curls Anti Frizz Defining CrémeThis is one killer anti frizz curl definer that will put the spring back into sad, straggly curls. KILLER. CURLS, our antioxidant rich, leave in anti frizz defining crme, helps to activate curls while adding essential moisture to throw out the frizz. Curls look and feel natural and soft, as KILLER. CURLS delivers the ideal balance of strong hold and elasticity to the hair.