An Oklahoma woman has hailed a good Samaritan as her hero after he intervened when a passenger on a plane began to fat-shame her by calling her a 'smelly fatty'.

Savannah Phillips boarded a United Airlines flight from Oklahoma to Chicago on Monday.

Before takeoff, the mother was seated next to a man whom she describes as ‘in his 60s with yellow sunglasses who claimed to be a comedian.’

‘As soon as I got buckled, he sat back down... his phone was maybe 12 inches from my face and he proceeded to text someone that he was sitting next to a "smelly fatty",’ Phillips wrote on her Facebook page.

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Chase Irwin, of Nashville, came to the aid of Savannah Phillips (right), an Oklahoma woman who was fat-shamed on a flight Monday from Oklahoma to Chicago. Irwin took a picture of the man who texted that he was sitting next to 'smelly fatty' (left)

Irwin (above), the manager of a Nashville bar and restaurant, realized the man was texting an offensive slur against Phillips and intervened

‘I don’t even know what the rest of his text said,’ she wrote.

‘I turned my head away as fast as I could. I was shocked and it was like confirmation of the negative things I think about myself on a daily basis.

‘Before I knew it, I could feel hot, salty tears coming down my face.’

Phillips told NewsChannel 5 that another man sitting across the aisle happened to see the text.

‘He tapped him on the shoulder and said, “I need to talk to you”,’ she recalled.

‘The guy took his earphones out and turned around and he said, “We're switching seats right now”.’

Phillips said the passenger told the comedian he would not tolerate the text messages he was sending.

Immediately afterward, the two men switched seats.

‘When he sat down he saw me crying and asked why I was crying,’ Phillips said.

'The flight attendant kept trying to give him free drinks and told him that he was her hero. He wasn’t her hero - he was mine', Phillips said

‘He said to not let it get to me and not to worry about it, and we started making small talk which made me feel better.’

It was later learned that the passenger who came to her aid was Chase Irwin, a manager at the Dierks Bentley’s Whiskey Row bar and restaurant in Nashville.

On the flight, Irwin took a picture of the man as he was texting.

‘This guy, prob mid 50s just text his wife that he is sitting next to a smelly fatty and was about to vomit,’ Irwin wrote on his Snapchat account as he took a picture of the man.

‘I watched her read his text and is now looking sad.

‘Should I New Mexico slap the **** out of him or just say something when landing?’

Initially, Phillips did not know Irwin’s name. She shared a post on Facebook asking for help in identifying the good Samaritan.

Before takeoff, Phillips (seen right with her husband) was seated next to a man whom she describes as ‘in his 60s with yellow sunglasses who claimed to be a comedian' and who 'proceeded to text someone that he was sitting next to a "smelly fatty"’

Irwin said he did not intervene for publicity.

‘I was going to wait until the end of the flight to say something but I could not have this guy sit next to her this whole flight and her thinking he's making fun of her,’ Irwin said.

‘It really gets to me deep down when I see someone crying, and when I saw her crying it really hit me hard and actually got sick to my stomach.’

Irwin told NewsChannel 5 the fat-shamer thanked him and asked why he wanted to swap seats.

Irwin replied: 'Because you're a heartless person, I read your text, and the girl next to you crying also read your text. And you should really take into consideration other people's feelings.'

Phillips said: ‘I was so blessed and happy he was there.

‘I hope it sets a good example for others for what they should do in situations like that and to stick up for people when they need help.’

'The flight attendant kept trying to give him free drinks and told him that he was her hero. He wasn’t her hero - he was mine.'

She added: 'I do feel a little more beautiful today.'