Phil Taylor crushed Chris Mason 4-0 to reach the last eight at the PDC World Championships - then accused his fellow Englishman of verbally abusing him.
Taylor is seeded second at Purfleet
The third-round clash had been given an added edge by Mason's criticism of Taylor in a national newspaper.
But after the defending champion had powered his way into the last eight, where he will face qualifier Darren Webster, he claims Mason swore at him.
"I'm not going to put up with it," said an angry Taylor. "It was filth."
The 46-year-old from Stoke even talked of quitting darts, although the threat was clearly made in the heat of the moment and he is unlikely to turn his back on a sport that has provided him with 13 world titles.
Mason had turned his encounter with Taylor into a grudge match by accusing his opponent of being arrogant and materialistic.
But the Purfleet clash became increasingly bitter as Taylor took complete control.
"During the match, he was arguing with the crowd and at the end he 'effed and blinded' at me," said Taylor.
I've put 18 years of my life into this game and I won't be talked to like a piece of dirt
"I don't like it, and there's no need for it.
"I don't want it. If they are going to do that then don't invite me again, because I'm not going to play with people who are going to 'eff and blind' at me.
"I shook his hand and went to go and he said 'Don't effing something else'. I don't like it and I won't put up with it."
Asked what he could do about it, Taylor replied: "I'll just walk away. Keep the game - I don't want it. I'm not going to listen to filth when I'm trying my hardest.
"I've put 18 years of my life into this game and I won't be talked to like a piece of dirt.
"I won't put up with it. You can get someone else to take my place, because I'm not putting up with it any more off people like him.
I'm just a working-class man who has done well for myself
"I'll see him upstairs in a minute, and we'll see how big and brave he is.
"I've had it for years off the players. It's silly.
"They don't work hard enough and they are blaming me for their mistakes. It's not my fault. I'm just a working-class man who has done well for myself."
Webster, Taylor's opponent in the last eight, reached the quarter-finals with a 4-2 win over South Africa's Wynand Havenga.
"I started off lovely but then I think the moment got to me and my hands started sweating," said the 37-year-old from Norwich, ranked 47th in the world.
"To do anything in my next match I'll have to play all the way through like I did in the second set."
Reaching a World Championship quarter-final is up there with my best sporting achievements
Webster was joined in the quarters by fellow qualifier Colin Osborne, who upset Dutch fourth seed Roland Scholten 4-2.
The Derby-based Osborne has now beaten three players ranked in the top 20 en route to the last eight.
"Reaching a World Championship quarter-final is up there with my best sporting achievements," said the 31-year-old, who used to be on the books of Middlesbrough Football Club and has also shone at golf and table tennis.
"It doesn't get much tougher than playing Roland. He's so consistent and a prolific scorer and you just have to hang in there and take your chance when you can."
Scholten was back on stage only 17 hours after being taken to a sudden-death leg by Alex Roy and looked a little sluggish.
With everything that has gone on recently I'm as chuffed as nuts
Osborne will now face 12th seed Andy Jenkins, who defeated fifth seed Adrian Lewis 4-3.
Jenkins, 35, had to come from 2-0 down to reach the third round of a world championships for the first time in his career.
"I'm over the moon with the way I came back," said Jenkins, playing only three weeks after the death of his father.
"I dug deep and really played well. With everything that has gone on recently I'm as chuffed as nuts.
"That has shown me I can produce my best on television. It's fantastic against a quality player like Adrian. He will be a future world champion - but not this time."
Namesake Terry Jenkins, seeded sixth, also made it through by beating fellow Englishman James Wade 4-3.
But third seed Dennis Priestley bowed out, losing 4-1 to Andy Hamilton.