This is Brad Pitt prior to cutting off his very long and scruffy locks pictured with wife Angelina.
His hair is parted in the middle and hangs straight down with no style really, just disheveled and messy. His dark roots show at the top while the bottom half still has bits and pieces of highlighted color. I guess you could call this the beachey wave thing and might be something a surfer would wear, but hey it's a style choice for many even if you don't surf the waves. A little Bumble and Bumble Surf Spray might be helpful to the non surfer looking to sport a style like this. After all, not everyone lives close to the beach and salt water to get the real effect.