Shane Ross and Mattie McGrath used to be on good terms, but they don't appear to be seeing eye to eye at the moment over the Road Traffic Bill.
According to a story in the Irish Times, the pair were involved in a heated exchange in the Dáil canteen, with Ross calling McGrath "an out and out bollocks."
Some people may find this particular word vulgar and abusive, but it has featured heavily in arguments between high profile people this week.
It was also directed at Eamon Dunphy by John Waters when he was interviewed on Dunphy's podcast The Stand.
Aoife Barry and Kate Brennan Harding discussed this on The Week Trending, along with other issues such as the Royal Wedding.
To catch the full chat press the play button on the image on the top of the screen