UltraMegagoth
A way to call someone that was born on Friday the 13th or Halloween. In order to have yourself referred to 'UltraMegagoth' you would probably need to be somewhat gothy and born either on Friday the 13th or Halloween.
Goth 1: My birthday's on Halloween
Goth 2: You must be an UltraMegagoth
Goth 2: You must be an UltraMegagoth