Harry Redknapp threatened to "sue the b******s" off a journalist as he angrily denied taking bungs, a court heard on Tuesday.
The Tottenham manager also said Milan Mandaric "don't know what he is f****** talking about" in a 2009 telephone conversation with a News of the World reporter.
In short extracts read out to a jury at Southwark Crown Court, Redknapp told Rob Beasley he had "the best accountants in England", claiming the Inland Revenue was fully aware of his dealings in Monaco.
Beasley spoke to Redknapp days after a telephone interview with former Portsmouth chairman Mandaric.
When Beasley described how Mandaric said the money sent to Redknapp's offshore accounts were investments outside football, the Tottenham manager replied: "He don't know what he is f****** talking about. What is he talking about? It is a bonus."
Explaining that the payments surrounded profit made on the sale of Peter Crouch from Portsmouth to Aston Villa, Redknapp added: "If it was something dodgy I would have gone over there and brought it back in a briefcase."
When Beasley asked him whether he had paid any tax in the UK on it, Redknapp replied: "Haven't been asked to, Rob."
Redknapp said "there ain't nothing crooked in it" as the telephone conversation went on, the court heard.
"Don't say bung," Redknapp said. "It's nothing to do with a bung. It's paid by the chairman. How can it be a bung when the chairman of the football club paid me?"
He added: "What's a bung? It's a f****** sick word."
According to the transcript, he told Mandaric: "I don't want to have a problem with the tax man."
"They was aware of it from day one," he added.
When asked about the bonus clause in his contract, Redknapp said: "My accountant has got my contract...I'm not going to f****** show you."
He added: "The Inland Revenue know all about it. I've got nothing to defend, Rob.
"I ain't done nothing wrong...I ain't done nothing wrong, Rob. I got paid a bonus...everyone is aware of it."
He later added: "Everyone knows about it, there ain't nothing crooked in it."
Redknapp subsequently told police "I don't fiddle", the court heard.
John Black QC, prosecuting, read out an interview which took place with a detective four months later in June.
Redknapp was said to have told a detective: "I said to him many, many times 'Milan, I don't want to end up with a tax bill'. I was told I wasn't liable for income tax on so many occasions."
Redknapp added: "For the sake of that amount of money or any amount of money, I don't fiddle.
"I pay my tax since I have been in football my entire life. I pay every penny."
Redknapp's account differed from what Mandaric told Mr Beasley on February 26 2009, the Crown claim.
Mandaric was said to have told Mr Beasley that the payments to the Monaco account were nothing to do with Portsmouth securing promotion to the Premier League.
The transcript said: "This is the money for my investment...a way to help Harry for the investment...we had become friends."
He added: "Rob, as I told you, it was nothing wrong. It was something I did for my friend...away from football."
Mandaric said he had "paid him a million or whatever it was I paid him" for Portsmouth's success on the pitch.
He added: "There was a contract and what I did for him was nothing to do with this."
As Mr Beasley told Redknapp what Mandaric had said, the manager said: "Well, if that's what he said, then he is wrong."
Redknapp added: "What people don't seem to understand - this money was paid by Milan in his American account...It was a bonus I was due."
Redknapp declared his Monaco account to inspectors less than two weeks before joining Spurs, the prosecution allege.
Both Redknapp and Mandaric deny two counts of cheating the public revenue when he was Portsmouth manager.
Redknapp failed to declare his offshore bank account for six years after "feigning" ignorance during a high-profile inquiry into football bungs, jurors were told earlier.
The manager previously only mentioned the Monaco account as he was questioned during the Premier League-led Quest investigation in 2006, prosecutors claim.
Black asked jurors to consider "is it the case that Mr Redknapp could be unaware of the bank account" when he had flown out to Monaco just a couple of years earlier to set it up in the name of his dog, Rosie.
Despite two separate inquiries into his finances - the first launched in the wake of his receipt of a £300,000 "gift" after Rio Ferdinand signed for Leeds from West Ham - Redknapp registered the account to tax inspectors only after his arrest in 2008.
Black said: "The existence of the bank account was not registered to Revenue and Customs for a period of six years, two months...after Mr Redknapp was first arrested and questioned in the course of this investigation."
The first mention of the offshore account came when Mandaric was asked by the Quest inquiry to provide details of payments to Redknapp, Black said.
"It's clear that it was only at this time that Mr Redknapp brought to the attention the existence of the Monaco bank account, feigning almost total ignorance of its existence, its operation and its contents," he added.
The first charge of cheating the public revenue alleges that between April 1, 2002 and November 28, 2007 Mandaric paid 145,000 US dollars (£93,100) into the account.
The second charge for the same offence relates to a sum of 150,000 US dollars (£96,300) allegedly paid between May 1, 2004 and November 28, 2007.
Redknapp, 64, who underwent minor heart surgery last year to unblock his arteries, is the most successful English manager in the modern game, having led Portsmouth to FA Cup success and Spurs to last season's Uefa Champions League quarter-finals.
Serbian Mandaric, 73, is now chairman of Sheffield Wednesday, having previously worked at Leicester.