Detroit rapper Eminem has unleashed one of the fiercest attacks against Donald Trump in recent memory, calling the US President everything from “Donald the b–––h” to a “racist 94-year-old grandpa”.

In a ferocious four-minute freestyle for the BET Hip Hop Awards on Tuesday,  Eminem blasted Trump over his stance on white supremacy, immigration, North Korea nuclear tensions, the NFL, the military and corruption.

The 15-time Grammy winner left no stone unturned, attacking Trump over his North Korean “calm before the storm” quip in an expletive-filled a capella riff.

“We better give Obama props ’cause what we got in office now is a kamikaze that will probably cause a nuclear holocaust while the drama pops, and he waits for s––t to quiet down, he’ll just gas his plane up and fly around till the bombing stops,” he begun.

“Racism’s the only thing he’s fantastic for cause that’s how he gets his f–––ing rocks off and he’s orange.

“Yeah sick tan, that’s why he wants us to disband ’cause he cannot withstand the fact we’re not afraid of Trump, f––k walking on eggshells I came to stomp.”

The rapper also known as Slim Shady turned his focus to Trump’s recent attack on black NFL players and former San Francisco quarterback Colin Kaepernick, who knelt during the US national anthem.

“This is his form of distraction, plus he gets an enormous reaction, when he attacks the NFL and we focus on that, instead of talking Puerto Rico or gun reform for Nevada,” he said.

“All these horrible tragedies and he’s bored and would rather cause a Twitter storm with the Packers.

“Now if you’re a black athlete you’re a spoiled little brat for trying to use your platform or your stature, to try and give those a voice who don’t have one, he says ‘you’re spitting in the face of vets who fought for us you bastards’.”

With each line Eminem picks up the intensity, skewering the President for his position on white supremacy and his endorsement for former chief strategist Steve Bannon – the executive chairman of the conservative media outlet Breitbart News.

“Same shit that he tormented Hillary for and he slandered then does it more. From his endorsement of Bannon, support for the Klansman, Tiki torches in hand for the soldier that’s black and comes home from Iraq and is still told to go back to Africa,” he said.

Eminem then accused Trump of disrespecting the military, referencing his previous attacks on Republican senator John McCain, who spent five years as a prisoner during the Vietnam War.

When Trump was questioned whether McCain was a war hero in 2015 he said: “I like people that weren’t captured, OK?”

“Unless you’re a POW who’s tortured … cause to him you’re zero cause he don’t like his war heroes captured. That’s not disrespecting the military,” Eminem said sarcastically.

“F––k that, this is for Colin, ball up a fist, and keep that s––t balled like Donald the b–––h.”

He even addressed his own fans, giving them the middle finger if they support Trump.

“We love our military, and we love our country, but we f–––ing hate Trump,” he ended.

I appreciate you @Eminem ✊🏾 pic.twitter.com/nwavBwsOkQ

— Colin Kaepernick (@Kaepernick7) October 11, 2017