Sour and sulky are 2 words that come to mind along with 'ungracious in defeat' fits his persona perfectly.
Please don't come back with the usual quips about "in the heat of the battle" and "spur of the moment": stupid rash comments are part of his armory and he could do much better without them because it just hilights his sooky attitude towards winning opponents.
Time for him and his like to grow up a big bit!
Adelaide United obviously saw something when they got rid of him!
