1. Although few people know it, the term derives from the name Germans called Canadian Expeditionary Force soldiers during WWI ("Sturmmann"). Certain divisions of German soldiers, both in WWI and WWII (Nazis), would later call themselves this name. Its meaning is exactly what you would expect--troops capable of quickly and efficiently overcoming opposing forces.
2. Imperial troops in Star Wars.
1. "Scheisse! Sturm-"
2. If every storm trooper was a clone of Jango Fett, why do they all suck so much in episodes 4, 5 and 6?