The term used for you or somebody else who has snorted large amounts of cocaine and they're really coked out. This is the term because cocaine is white and stormtroopers are made outta white armor so its appropriate because there is alot of white runnin through their system. I just reread this and I probably shouldnt have smoked a fat L of some dank before but you get the point.
Alex: Yo Sam do you know where Tim is? I havn't seen him for hours...
Tim: Dudeee he's been stormtroopin all day downstairs on the couch hahaha.