The deputy leader of Sinn Féin appears to have called the Tánaiste a "wimp" in the Dáil.
A row erupted on Leaders Questions over plans to deduct unpaid water bills from wages, welfare and pensions.
Relevant segment from today's proceedings starts at 13:00. Mc Donald's 'wimp' comment can be heard in the final few seconds.
Mary Lou McDonald asked Joan Burton is the Tánaiste supported the plan, but the Labour leader did not rise to her feet to respond.
Joan Burton supports the raid on wages welfare and pensions for unpaid water charges. She just won't say it out straight.— Mary Lou McDonald (@MaryLouMcDonald) March 26, 2015
Deputy McDonald took to her feet and appeared to call the Tánaiste a "wimp" off-microphone as the Ceann Comhairle appealed for order from TDs, and moved on to give Deputy Maureen O'Sullivan the floor.
Deputy McDonald's comments were barely audible above the raised voices of her peers.