The host of the U.K. edition of “The Apprentice” used a vulgarity to refer to President TrumpDonald John TrumpRepublicans aim to avoid war with White House over impeachment strategy New York Times editorial board calls for Trump's impeachment Trump rips Michigan Rep. Dingell after Fox News appearance: 'Really pathetic!' 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."