Clive Palmer has apologised for arguing and swearing at Tony Abbott over Liberal Party lobbyists, and compared fighting with the Coalition leader to arguing with his wife.
Fairfax Media reports Palmer said there "certainly was swearing" in a recent stoush between him and Abbott.
"I can't recall whether Mr Abbott was swearing because I was swearing a bit more than he was," he said.
"It's like going mad at your wife and you don't know what you're saying and you regret it later on."
The disagreement centres on Palmer's push to have paid lobbyists banned from serving in senior roles in the Liberal Party.
According to Fairfax Media Palmer says such an arrangement means the party can be bought out to the "highest bidder".
Abbott has firmly rejected the assertion and says there's "no evidence" to suggest members of the LNP have had their integrity compromised.
Palmer has previously given large donations to the LNP and announced plans earlier this year to seek LNP preselection to challenge Treasurer Wayne Swan in the Brisbane seat of Lilley.