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1.
One fcking badass hybrid of dubstep and metal. Known to make the weak and unaccustomed cower in fear of its glory until they implode into nothing.
If dubstep gives you chills and metal makes your heart race, metalstep will make you shit yourself.
by FPS Ukraine August 16, 2011
 
2.
A more proper term to describe what many call Brostep and a subgenre of Dubstep lacking dub, sub-bass wobble and sub-bass. Usually incorporates an aggressive sound complete with extreme midrange wobble (sounding like a metal guitar) and heavy drops.
Mark: "Oh, you listen to 'real' Dubstep, don't you? Are you one of those people that call my music Brostep?"

Matt: "Although I don't like your obsession with Skrillex, I respect your music choices and prefer to call it Metalstep, which sounds like the music you listen too."
by r4nd0mXn4m3 January 15, 2012