twist EH NAH ER RAH AH AH
This phrase is one of the lyrics from a song called "twist", which is by the nu-metal band called "korn." Many metalheads and emos will likely shout this phrase at you if they think you are swag enough, so respond back with more lyrics from the song. If you are lucky enough to get this shouted out at you, you must be one swag person and the person who shouted it at you might want to start a friendship.
metalhead: TWIST!!!! EH NAH ER RAH AH AH
You: TWIST!!!!!!!
*you and the metal head then walk away and be metal together*
You: twist EH NAH ER RAH AH AH
You: TWIST!!!!!!!
*you and the metal head then walk away and be metal together*
You: twist EH NAH ER RAH AH AH