Top Definition
stands for Multi Site Steel War, which is an event that happens inside of runescape that consists of several major runescape fan sites fighting a war. Usually it is referred to as MSSWx where x is a number that defines what steel war you are referring to.
RSC won MSSW1 (runescape community won multi site steel war 1)
by dustout April 30, 2007
5 Words related to MSSW

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