[quote=KiraTheRogue]
Does it mean anxiety and fear?
[/quote]

It means an extreme state of depression, and its used for emo characters in the majority of the tumblr community that has to do with ocs. 

Sorry if I'm striking your characters hard, but I'm being real. If a character has fucking angst all over it, I'm calling ot out. If the character sounds like its going for the special snowflake award, I'm pointing the fucking thing out from now on.

Special snowflake means its trying way too hard to be different,such as obessed with drugs at twelve. So its incredibly unrealistic and obscure differences in characters.