Big Gay Out regular John Key has mocked a host's "gay" red top.

John Key appeared on The Farming Show as a co-host on Friday, where after dancing in his chair to Adele, he quickly remarked to co-host Jamie Mackay:

“What you’re wearing is a big disgrace. You parade yourself as some sort of centre-right interested community member … and you’re in the red,” the National leader says about Mackay’s red sweater, in a giggly exchange.

Red is the colour of the opposition Labour Party.

“You’re munted mate, you’re never gonna make it,” Key later adds when talking about a planned golfing afternoon. “You’ve got that gay red top on,” before laughing.

You can hear the exchange here.