Mark Latham argues the victim of a vulgar, sexually explicit tweet was not defamed because people instead offered sympathy and support, in submissions slammed as incoherent and irresponsible.

The firebrand independent MP is challenging an order to pay fellow crossbencher Alex Greenwich $140,000 over the post sent days after the NSW state election in 2023.

The tweet described the gay politician engaging in explicit sex acts and came as a response to Mr Greenwich describing Mr Latham a "disgusting human being".

The court found the post defamed the LGBTQI advocate by suggesting he engaged in disgusting sexual activities.

The former federal Labor leader and NSW One Nation leader has appealed, claiming that calling someone gay or saying gay men had sex was not defamatory.

Mr Latham has arg

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