Jackass star Bam Margera has never shown much regard for anything, not least his own body.

Just a few weeks after being arrested in New Orleans during Mardi Gras, he traded punches with an unnamed Aussie, who also happens to be a professional boxer (and an undefeated one at that).

Margera was enjoying a pleasant evening out and about in Adelaide with a lady friend, when the pair were suddenly confronted by her ex-boyfriend. Words were exchanged and the situation quickly escalated, with fists sent flying.

The good news was that neither were seriously hurt, and after speaking to police, no arrests were made.