A Brisbane woman who stood up to an aggressive racist bully on a city bus is saddened more passengers didn't call him out on his behaviour.

Kylie Reid was commuting home from Chermside on the 333 bus on Tuesday afternoon when she overheard a man seated in front of her making offensive remarks to another woman, including “go back to your own f---ing country”.

“I told him that I didn't want to hear his swearing and racism and that his behaviour was completely inappropriate,” the 26-year-old said.

“He started raving on about how he was an 'Aussie native' and challenged my 'Aussie blood'. I said Aussie or not, he didn't represent Australian attitudes.”