The Undercut was a popular hairstyle that originated in the Prohibition Era of the 1920's. The haircut worn by actor Michael Pitt from the TV show Boardwalk Empire is a great example. For this haircut you will need to be proficient with your clipper cutting techniques and layering hair with your scissors. You also need to have an understanding of the term disconnected. This means a haircut that is basically two different haircuts in one and do not blend together. Most recently soccer star David Beckham along with Michael Pitt made this hairstyle popular again.