'Jingoistic moron': Peters slams Aussie senator

As the Senate prepares to vote on a censure of Fraser Anning for comments about the Christchurch mosque shootings, New Zealand's deputy prime minister has labelled the Senator a "jingoistic moron" and called for Australia to change its political system to keep similar figures out.

Australia's parliament will vote on Tuesday to admonish the Queenslander for blaming the March 15 terror attacks on Muslim immigration.

But ahead of the motion, New Zealand's outspoken deputy and currently acting PM, Winston Peters, had some criticisms of his own.

"I could call him a four-flushing, jingoistic moron, but you already know that in Australia," Peters told Sky News.

"He is a national, absolute, democratic aberration. We all know why he's there. He's there by pure accident. It means you have to clean up your political system to avoid that sort of person making it into politics."

Earlier asked about Anning's remarks, New Zealand Prime Minister Jacinda Ardern called them "a disgrace".

Anning has stood by his statements and has called the censure a "blatant attack on free speech".

New Zealand's parliament, meanwhile, is expected on Tuesday to nearly unanimously agree on a first vote on stricter gun laws proposed in response to the shootings that killed 50.