Anyone who fails to recognize a troll and responds to it with anger or annoyance is said to have been "trolled". Being trolled often results in large quantities of butthurt.
*On an online forum*
Guy 1: You internet geeks are pathetic! I can bench 300lbs and have a banging hot girlfriend. (She just blew me, shit was SO cash.)
Guy 2: You think you're so much better than us? FOAD, internet tough guy!
On urbandictionary, a thumb war consists giving your own definition a thumbs up and giving a rival's definition a thumbs down on a daily basis while said rival does the same for himself. A thumb war is won when one of the contenders forgets to vote and/or gets a life.
I hope the addition of this definition doesn't provoke a thumb war.