A hybrid of trolling/bullying, on web forums; serial trolling somebody with intent to bully them. Trolling isn't about harassing one person in particular, it's supposed to be about baiting anonymously, not personally. Signs you are being trullied are someone claiming "I'm just trolling yo" repeadedly and redundant/contradictory explanations for their actions. Frequently happens when somebody with more immaturity than self-esteem loses an argument to somebody, and needs to exact their revenge.
"Looks like Jimmy and Matt are trullying Shawn in the discussion forums again. Those sociopaths must be looking for another aspie meltdown out of him because they have nothing better to do."