To my knowledge, it means attempting to lure others into combative argument for purposes of personal entertainment and/or gratuitous disruption. Or by extension, to incite anger, or to provoke, or harass or annoy.
In the thread linked below I had no intention of luring others into combative argument. Yes it was about personal entertainment and for self-amusement. But it absolutely had no intention to annoy, harass, provoke or anger others!
Why in the God’s name did you consider it trolling? It was of a little curiosity and self-amusement. Why are you getting angry at those who post a few unserious post?