Premier Annastacia Palaszczuk has defended her deputy over claims he has form acting like "a bit of an idiot" and needs to grow into the responsibilities of his job.

A day after Deputy Premier Steven Miles shocked crowds when he stumbled over a Labour Day speech at a Brisbane march and appeared to call Prime Minister Scott Morrison a c---, Ms Palaszczuk said her deputy took his responsibilities "incredibility seriously".

"He's apologised for that and he didn't mean it and everybody has a slip of the tongue every now and then," she said at a press conference attended by her Treasurer, Health Minister, Agriculture Minister, Tourism Minister and Water Minister but not Deputy Premier.

Premier Annastacia Palaszczuk and Steven Miles in Longreach. Picture: Darren England/ AAP
Premier Annastacia Palaszczuk and Steven Miles in Longreach. Picture: Darren England/ AAP

The press conference was held following a community Cabinet meeting in Longreach attended by all ministers.

Mr Miles earlier attended a photo opportunity with Ms Palaszczuk, Treasurer Cameron Dick and Agriculture Minister Mark Furner at the Longreach saleyards but did not speak there.

Mr Morrison earlier accepted Mr Miles's word that Monday's misstep was a faux pas, but said "he has a habit of carrying on like a bit of an idiot".

"I'll let him defend his own thing, he should sort of step up to the responsibility of his position," the Prime Minister told Sunrise.

"But just for the record, I was at home watching Shrek the musical with my daughter.

"There was no events that night.

"So, you know, he can't even get that bit right."

Deputy Premier Steven Miles on stage at a gathering after Brisbane’s Labour Day march. Picture: Liam Kidston.
Deputy Premier Steven Miles on stage at a gathering after Brisbane’s Labour Day march. Picture: Liam Kidston.

In a slip of the tongue, Mr Miles appeared to call Mr Morrison a "c---" as he criticised him for being in town and "holding $5000-a-seat fundraisers".

"Albo's (federal Labor Leader Anthony Albanese) here with us at Labour Day while Scott Morrison's charging $5000 a head to have dinner with him," he told the rally.

"What a cun … contrast."

He later said he had made "a slight stutter" and "whatever I think of the Prime Minister, I would never ever use … language like that".

Prime Minister Scott Morrison attending an event in Rockhampton for Beef Week.
Prime Minister Scott Morrison attending an event in Rockhampton for Beef Week.

Mr Miles has copped criticism in recent months for claiming Mr Morrison was using the vaccine rollout to distract from federal parliament's "women problem", for ripping up NSW's hotel quarantine bill and refusing to pay it and for holidaying in Byron Bay while publicly highlighting the plight of Queensland tourism operators.

Originally published as Palaszczuk defends Deputy Premier after PM's 'idiot' blast