The game seriously needs new taunts. The ones in the game are fine, but limited. Yes you can get creative by using a laugh followed by several cries to mock opponents relying on the crutches of Regeneration and Purify, but it wouldn't be as effective as just having a taunt of Cartman calling the opponent a loser. Not all of us want to rely on cheesy combos to get cheap victories, so give us ways of mocking the losers that do. It's a mature rated game, so give us mature rated taunts.

Ideas for this would be:
Cartman calling the opponent a loser.
Cartman calling the opponent a cheap *******.
Cartman saying something along the lines of, "Seriously? You need to use that to win?"
Cartman saying, "You piece of ****"
Mr/Me Garrison saying, "****** ALERT!"

Make them unlockable in the shops for extra fun with taunting opponents.