a type of paintball game usually played in woods. in this version of paintball the markers are all put up to full blast and getting hit doesn't mean your out. your out when you simply can't take the pain anymore. t-shirts and jeans are the only allowed clothing (with the exception of cups, which are highly highly recommended)
Jon: Wtf Steve! you get mauled by a bear?
Steve: nope, but i did win a game of iron man (paintball) last Thursday.