A leading Muslim businessman says he was just being a 'larrikin' when he said the white race would become extinct within 40 years because Australian men are too busy smoking, drinking beer and taking drugs to procreate.

Halal certification boss Mohamed Elmouelhy said he was embracing the 'Australian larrikin way' when he told his Facebook followers Australian women needed Muslim men to 'fertilise them' and 'keep them surrounded by Muslim babies'.

'I'm an Australian, Australian's are known for being a larrikin,' Mr Elmouelhy told 2GB's Chris Smith on Friday, defending his vile comments as 'tongue in cheek'.

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