A portmanteau of "Troll" and "Character" known to frequent Reddit, other social networking sites and message boards. They meet the definition of "troll" in that they usually post off topic or inane comments, but they do it with a theme relating back to their user name, thus the "character". As with all human endeavors, there exist hilarious trollacters, and subpar trollacters.
"911_was_an_inside_job is such a trollacter. All his posts seem to relate back to how 911 was an inside job, and we are all sheeple."
"YoMama was a great trollacter, throwing out a Yo Mama joke about every article"