The actor just tried to dig out from under an interview, where he was quoted as saying he only recently stopped using the f-word after his own daughter checked him hard.

Matt attempted to clear the air Monday, saying the quote from his interview with The Sunday Times was him recalling a discussion he had with his daughter where he tried explaining lots of progress has been made since he was a young kid growing up in Boston and hearing the f-slur used on the street before he knew what it meant.

MD told Variety ... "I have never called anyone 'f****t' in my personal life and this conversation with my daughter was not a personal awakening. I do not use slurs of any kind."

As we reported ... The Sunday Times reported Matt said in an interview his daughter called him out when he used the f-word in a joke -- she explained how the word is dangerous and he told her, 'I retire the f-slur!'

Now, Matt says he told his daughter the slur was uttered "constantly and casually" when he was younger and pointed out it was even used as a joke in his 2003 movie, "Stuck On You" ... adding she was incredulous the word was used so flippantly. He seems to be saying even though he heard it a lot growing up, he never used it himself.