NZ First's Ron Mark has been involved in another debating chamber spat, this time getting away with it despite calling another member a "lying little s***".
An unidentified MP on the government benches interjected while Mr Mark was speaking on Wednesday night.
It wasn't picked up on the microphones but Mr Mark heard it.
"I won't be called a liar by that lying little s... over there," he shouted.
Mr Mark apologised before being ordered to and Deputy Speaker Chester Borrows didn't take any action against him.
He's a serial offender and was last month ordered to apologise for calling Health Minister Jonathan Coleman a "lying prat".
Dr Coleman had said Mr Mark, a former army officer, had been an army cook.