to nwerle someone is to bitterly seek retribution for a passed event that the person deemed unjustified or moronic, but the perpetrator viewed as a standard occurance. The retribution is not limited by normal restraints and will occur in a completely illogical places. The person being nwerled will often be surprised by the illogical placement of the retribution.
in a poker game, two player play a big pot, player2 holds trup Q's versus player1s KK, when the money is bet pot player2 is winning and player1 had a 4% chance of winning. player 2 is understandly upset that player1 won the hand and decides to "nwerle" him. one day player2 is checking his ebay account and finds a message about the hand, its says: you bet KK into trup queens you ****ing moron. he then forwards this message in extravagant and illogical ways such as in letters to player1s wife, on a decorated cake, by sky writing from red arrows planes, on billboards, ect. to gain what he views to be rightful embarrassment of player1, and so in his mind justice has been served.