The former Australian international became a hero during his time at Goodison Park with a number of important goals after moving to Goodison Park from Millwall in the summer of 2004.
The midfielder ultimately made 68 strikes during his time at Merseyside before moving to the New York Red Bulls in 2012 – many of these goals being followed by the same corner flag boxing celebration.
And Cahill has now described the origin of this celebration and spoke of his immense pride in seeing the children reproduce it in their own games.
The 40-year-old told Sky Sports, “I will apologize officially now for every corner flag I have touched in my career!
“He was from Australia. One of my close friends I was playing with, Archie Thompson, had a kung fu celebration and I collaborated and choreographed it a little better.
“I was lucky after so many games, we lost a bit with Everton, we played against Sunderland away and I scored in the 92nd minute.
“It was the perfect time to bring out the celebration, and it has been stuck ever since! I’m so proud of it because I see kids on the street doing it and during FIFA celebrations too. It makes me very proud.
“It naturally increased. At the 2006 World Cup, I did it when I was Australia’s top scorer at the World Cup.
“He just stayed with me. When you see kids doing it, it triggered something in me to go on and laugh with.
“Since it’s been so special. “
Cahill was participating in a question and answer session on Instagram with Sky Sports, which invited fans to submit questions on a number of topics.
The former Everton midfielder was also asked about the current situation at Goodison, and what he did with the appointment of Ancelotti as manager.
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And the Australian had a brilliant story to accompany his response.
He added: “Carlo Ancelotti, to have him in our football club … I came across him when I was there a few months ago, what a gentleman!
“He walked past me, saw me, turned around, gave me a big hug and said I can come in whenever I want. This is the raison d’être of the club.
“Unfortunately for Marco Silva, he was a great manager but had a hard time. I think he should be more open and embrace the fans.
“You see the personality of Ancelotti, the aura he wears and the respect. He won over the fans, which is important because they are a big part of the football club.
“Overall, the club will be better than it is now. I can’t wait to see where we can do it if football starts again after this coronavirus. “