Colin Fassnidge wrote a scathing message to all of his social media accounts, hitting on a complaining customer, who dined at his restaurant.

'MY Kitchen Rules' judge received a criticism from the unsatisfied diner. Although he is known as a tough judge, the critique from a diner seems to outburst Colin's temper.  

He wrote, addressing to the complaining diner, who is only known as Mike, "Thanks Mike for the feedback on how [expletive] you meal was in the bar only third week in a row!."

"And it's because I was off and how it would be better if I was there and how you marked each dish out of 10 like TV (freak).

Fassnidge further goes on, that he is a very busy person and he can't always be there all the time.

"The thing is Mike I have two restaurants, a family hence I can't be there all the time also I stand 100 per cent behind all my hard working staff."

"So if in three times on three visits you don't like what we do (or just like typing) I would say as nice as I can. [Expletive] off up the hill."

Fassnidge owns two restaurants, 4Fourteen and The Four in Hand Dining Room. Both restaurants are located in Sydney.

It is unclear which of the two restaurant the diner was referring to.

The celebrity chef was considered as the toughest judge on 'My Kitchen Rules' for the past two seasons of the reality hit series.

As an experience chef, Fassnidge insist that they always try their own dishes before they put it out.

"Even when I watch cookery shows, I shout at the telly, 'Now why would you do that?' In a restaurant, we try our own stuff before we put it out," Fassnidge told Stuff.