Basically, you use ninja-like tactics to put a straw on someones person (pocket, hood, bag, etc.) The object is to do this without being caught. You get a point if the straw remains for three or more seconds. More points may be added depending on how badass it is.
Walking through a public place with ninja strawers (those who straw, or participate in strawing). Ninja strawers place straw in the hood of a person walking in front of them. Could also be placed in bags/purses, pockets, pants, etc.