The Liverpool manager told his Arsenal rival to "piss off" when Wenger questioned a penalty awarded in the 11th minute of stoppage time at their clash at The Emirates.
United fans are now petitioning the FA to take action over the incident, suggesting that it will be "double standards" if Dalglish is not charged. Wayne Rooney was banned from the FA Cup semi-final with Man City after shouting the F-word into a TV camera a fortnight ago.
Speaking to the BBC after yesterday's game, Wenger continued to doubt the validity of the penalty, which lead to Liverpool's equaliser. "We conceded a penalty after 11 minutes when the referee said there was eight minutes of injury time," he said. "I don't see where those three minutes came from and it was no penalty."