The revived option to post up. Maybe not made by Cassidy just cut back by him. Orignated from Curtis Blow the first B-Boy.just how to get it done: once you postin up on a wall or off, get across your arms and keep a laid straight back look on ya deal with. A historical pose utilized by the rap & break moving neighborhood in 80's. The most famous position is that for the arms crossed in front with hands under each arm gap while standing with head tilted somewhat straight back. Although nobody of African American history performs this any longer, it is mostly being kept live today by from touch white comedians and actors trying to act black colored. Generally followed closely by either a weak rhyme, beatbox or even the term "yo".