Taylor Swift fans have shared their shock over some X-rated lyrics during the Australian leg of her Eras tour.

The global megastar, 34, has been performing to sell-out crowds across Sydney and Melbourne over the past two weeks, with support act Sabrina Carpenter kicking off the show each evening.

Sabrina, 24, has performed her popular track Nonsense during every set but has put an Australian spin on the famous outro lines, belting out a different variation during  each show.

Some fans have been left shocked over the increasingly racy nature of the words, criticising her for singing ‘inappropriate’ lyrics in front of young fans.

The original outro goes: ‘This song catchier than chickenpox is, I bet your house is where my other sock is, woke up this morning and thought I’d write a pop hit. How quickly can you take your clothes off – pop quiz?’

However, during one of her Melbourne shows, she sang: ‘I don’t say ‘hello’ I say ‘g’day mate’ / I don’t make a bevvy, I’m a lightweight / Melbourne, I just came, I saw, and I ate.’

They have become increasingly risqué since she began performing on the Eras tour, but one of her latest variations in Sydney left some fans unimpressed.

She sang: ‘When you go down under, do you miss me? He’s so big I felt it in my kidney, screamed so loud they heard it here in Sydney.’

Some fans took to social media to share their disapproval, arguing the lyrics were ‘inappropriate’ to sing in front of children.

‘Chill there is children in the audience,’ one wrote, while another said the song was ‘disgusting’.

‘Oh dear. There are children there lord have mercy. Spicy is one thing saying he’s so big I felt it in my kidney is inappropriate,’ another added.

However others flocked to support the songstress, sharing their amusement over the X-rated switch-up.

‘It just gets better and better,’ one said, while another mused: ‘She really has knack for these. She to is clever with words.’