Retired independent MP Tony Windsor has launched an extraordinary spray, daring Cory Bernardi to quit the Liberal Party while urging Prime Minister Malcolm Turnbull to "piss" and kick the outspoken senator out of the party or "get off the potty."

And Fairfax Media can reveal the Queensland Nationals MP George Christensen is considering his own future over the festive season.

Speculation is rife that Liberal Senator Bernardi is preparing to defect, despite the conservative South Australian dismissing suggestions for months of a breakaway.

Senator Bernardi could not be reached late Wednesday and has told friends he plans to keep a low profile over the Christmas and New Year break. Late last month he said witnessing the election of political maverick and outsider Donald Trump to the US presidency had been an epiphany.