A video(most likely soon to go viral) or any other form of media occurring on the web that has such magnitude that it draws trolls far and wide. This converging of trolls doing what comes natural is a troll reunion. Normally caused by an angry ginger, a riled up Christian, or a slut twelve year old regretting her past in video form.
Hey did you go to that troll reunion of that 'ginger has souls kid'?" "Yeah, I commented so many times on his vid. He must be pissed