The degree of Win surpassing Epic Win, and Epic Fucking Win by miles, this should only be used in the presence of a miracle or things that are mind blowing beyong any recognition.
see: epic win
Dude1: "oh shit dude, did you see that guy? he's fucking bullet-proof! he took like ten bullets and he still took out all of those gang members!"
Dude2: "S.M.E.W.T. dude, that was fucking S.M.E.W.T.!"