"Malcolm Turnbull is making his pig bitch in ... his big pitch," she said, before breaking out in hysterics.
Her Sunrise colleagues even gave her a round of applause while she composed herself.
Cummins, who is pregnant, said: "I think I'm going in to early labour ... Look out for those pig bitches today."
It's not the first time Cummins has put her foot in it. During a live cross in 2012, she got herself in strife again when describing Tony Abbott's run for prime minister.
"Tony Abbott still needs to be erected ... elected first," she said, before referring to her notes. "We need to vote him in before any of this happens."
Later, she tweeted: