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1.
MRW
An abbreviation for "My Reaction When".
MRW I ate the last pringle :(
by reddcube November 30, 2012
 
2.
MRW
TLA for Most Recently Worn.
Fred: "You're just gonna put those grimey socks on off the floor?"

Todd: "Yeah man. They're my MRWs. It's straight."
by methodbrzagza May 17, 2007