NORTH Korea is threatening all out war with the US after a top US senator dubbed their leader Kim Jong-un a "crazy fat kid".

Senator John McCain made the inflammatory remarks while discussing the tyrant's recent ballistic missile tests and his repeated threats to destroy the US.

6 Kim Jong-un having the time of his life during one of many official inspections of food factories

6 When Kim Jong-un is not inspecting his rockets he can often be found touring catering plants

In an interview on MSNBC, McCain called for action against cheese and wine-loving Kim before it is too late.

He said: "China is the only one that can control Kim Jong-un, this crazy fat kid that's running North Korea. They could stop North Korea's economy in a week.

"They haven't, because the Chinese have to understand there's a penalty... imposed by us if they don't rein in an individual that can literally start a world war, and more importantly, perhaps in the short term, strike the United States of America."

6 Credit: Reuters

McCain has been outspoken about dealing with North Korea in the past but the regime thinks he has gone too far this time

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But North Korea hit back in a statement released by government-controlled news agency KCNA saying: "What they uttered to dare hurt the dignity of the supreme leadership of the DPRK is just a manifestation of their worst hostility toward the DPRK's ideology and social system and its people and a grave provocation little short of declaration of war against it.

6 Kim Jong-un is over excited while watching the Korean People's Army tank crews' competition at an unknown location Credit: Reuters

"The service personnel and people of the DPRK are regarding the dignity of their supreme leadership as their life and soul.

"The US must know very well about how they react to any offensive acts against it.

"John McCain and Ted Cruz made a provocation tantamount to declaration of war against the DPRK. The DPRK will take steps to counter it."

6 Kim Jong-un styles himself as one of the people, but he lives a life of luxury while his countrymen struggle to get by Credit: Reuters

This is not the first time Kim has been stung about jibes about his weight.

As reported, North Korean diplomats have made a state request to officials in China pleading for them to stop referring to ‘glorious leader’ Kim Jong-un as FAT.

Ministers have reportedly asked their neighbours to refrain from referring to the chunky food fan as Jin San Pang or ‘Kim Fatty III’ in media or conversations.

6 Kim Jong-un has been piling on the pounds in the past year Credit: Reuters

North Korean scientists have revealed they have invented a cure for obesity - although clearly it Kim is either not taking it or it doesn't work.

The secretive state is also been lashing out at the US after it sent a missile system to South Korea.

Officials released a statement earlier this month warning Donald Trump it would reduce the US to ashes if America fires “even a single bullet” towards capital Pyongyang.

North Korea has continued testing nuclear weapons in a bid to develop their deadly intercontinental missile which could kill millions of Americans.

Meanwhile Japanese lawmakers are calling for new laws to allow Tokyo to launch preemptive strikes against an increasingly aggressive Kim Jong-un.

Last week Japan also began staging mass evacuation drills following yet more missile tests with the rockets landing off its coast.

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