Flagger troll: a troll who reports other people's content just to get it removed, even if it isn't broken, miscategorised or even lacking in quality.
FTHOI (For The Hell Of It) troll: a term used to describe a troll who causes trouble just to get people annoyed, which he/she finds ammusing for some reason.
One-starring: to rate content as "Garbage". Other variations include one-starred, one-star and one-starrer (I know, the last example was garbage :P)
Vengance troll: a troll who despises another user and decides to rate their content as "1 star", insult them and -as I have recently found out- flag the user's videos (also known as a flagger troll).
Hater/Fanboy/Fangirl troll a user who has an unnatural hatred for the spot's subject and seeks to sabotage it in every way possible.
Ego troll: Also known as the UTOA (Up Their Own Arse) troll, an Ego Troll who accuses another user of being pathetic compared to themselves (these are mainly false accusations, due to the typical troll lacking in talent)
Right, this soapbox will improve once I've remembered more of them.