The host of the U.K. edition of “The Apprentice” used a vulgarity to refer to President TrumpDonald John TrumpO'Rourke: Trump driving global, U.S. economy into recession Manchin: Trump has 'golden opportunity' on gun reforms Objections to Trump's new immigration rule wildly exaggerated MORE on live TV, forcing “Good Morning Britain” host Piers Morgan, a longtime ally of Trump's, to apologize.

The remark from Lord Alan Sugar came during a discussion in which Morgan questioned Sugar about his wealth.

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“I tell you, you could write a check using my total funds of around about £250 million, present it to the bank and it would be paid,” Sugar said.

“That tosser with the hair,” Sugar continued, referring to Trump with a British insult comparable to "wanker." “He couldn’t do that."

The comment came after the show aired a clip of Trump criticizing Sugar to Morgan, according to the Evening Standard. 

Morgan interjected to scold Sugar: “Oh please!” the host said. “That’s the president of the United States, Alan.”

He went on to apologize to viewers, saying: “That’s no way to talk about the president of the United States … and I’d like to apologize.”

“The only one offended would be him,” Sugar shot back.

Morgan, who won a season of the Trump-hosted "Celebrity Apprentice," on Monday released an op-ed asking to be made the president's next chief of staff. 

Morgan wrote in the Daily Mail that he would be a good option to replace the exiting John KellyJohn Francis KellyMORE because the "key thing is to have someone at your side that understands you, has known you a long time, likes you and commands your respect."