Guest Quentin Letts clashed with the presenter over the UK's treatment of refugees, saying: "There's no point talking to you."
The divisive presenter has taken aim at his former employer as he gears up to launch his new TV venture.
"Shaking. Hyperventilating. Throwing up."
Andi Peters Reveals 'Ridiculous' Reason He Can No Longer Call ITV's Huge Cash Prizes 'Life-Changing'
"We argued back... I went all the way to the top."
"Why don't they just call it Thoughtless of the Day?"
After 15 years, the GB News anchor stepped down as a host on This Morning in December.
"This guy stinks in the nostrils of decent people."
Tabloid reports recently suggested the stars were a little more "pampered" than we see on screen.
"Forgive me...Forgive me...Forgive me..."
Piers' comments about Meghan Markle' led to a record number of Ofcom complaints earlier this year.