Someone who engages in acts very similar to the emo subculture, whether it be by listening to "emotional" bands such as Hawthorne Heights or Panic! At the Disco or writes depressed broken heart poetry, but tries to keep the "extracurricular activities" secret from friends and peers.
Closet Emos sometimes have physical aspects similar to normal emos, as they may have dyed black hair an extremeley pale complexion, however paleness may be an attribute to an extreme gamer. However, for them most part they look relativly normal.
The Closet emo has become a rarety in later dates, since the commercialisation of the emo and emo subculture, emos no longer needing to fear the highschool football captian bashing them up for wareing eyeliner.
Girl: His hairs DYED BLACK? Fuck, it looks natural.
Closet-emo: You wouldn't know if I was a closet emo, Twiggy, since id be in the closet, which you cant open
Guy: I can so work a door! (goes and opens doors and closes it)