Someone who has the marks/scratches/scars on their arms that would cause someone to see them as a emo cutter. The person of course may not be an Emo cutter, but just have the arms that look as though they are.
That guy looks like he has emo arms but really he was just out in the weeds and got all scratched up.
Someone who thinks that they are better than they are at something. The person tends to embarrass them self when they fall short of the expectations people have come to expect from the way they have been acting.
That douche just failed miserably in the race. He was so overly confident that he forgot he actually sucks.