Matt Damon, 50, says daughter had to tell him not to use homophobic slur in 2021

Matt Damon has admitted his daughter had to recently teach him why using the homophobic slur "f****t" is offensive after he said it at the family dinner table. 

The 50-year-old actor revealed that he had continued to use the word until just a few months ago, despite it being 2021 and most fully-grown humans knowing better. 

"The word that my daughter calls the 'f-slur for a homosexual' was commonly used when I was a kid, with a different application," he told The Sunday Times in an interview. 

"I made a joke, months ago, and got a treatise from my daughter. She left the table." 

"I said, 'Come on, that's a joke! I say it in the movie Stuck on You!'" he added, referencing the 2003 film in which Damon and Greg Kinnear play conjoined twins. 

"She went to her room and wrote a very long, beautiful treatise on how that word is dangerous. I said, 'I retire the f-slur!' I understood." 

It's unclear which of Damon's daughters - aged 15, 12, and 10 - took issue with the word. Damon's eldest daughter, 22, was adopted by him when he got together with her mother, Luciana Barroso. 

If you're surprised/disturbed/confused by Damon's revelation, you're not alone. Twitter had plenty to say about the Good Will Hunting star's comments. 

"So Matt Damon just figured out 'months ago', by way of a 'treatise' from a child, that he's not supposed to say the word f****t. Months ago," Oscar winning screenwriter Travon Free wrote on Twitter. 

"I'm around the same age as Damon and I've known this word was a slur since my teens. Pretty incredible amount of privilege to just realise it now," another tweet read. 

"And he went to Harvard. Let that sink in," said a third. 

Thank goodness for Damon's daughter - let's hope she can be on hand to teach her dad you can't put metal in the microwave and not to run with scissors.