A Melbourne engineer who claims his colleague repeatedly farted near him and "thrusted his bum" at him has lost his bullying case on appeal.

But David Hingst has vowed to take his case to the High Court.

He had sought $1.8 million in a suit against his former employer Construction Engineering, but a judge blasted the case out of the Supreme Court last year.

Workplace bullying claimant David Hingst has vowed to take his case to Melbourne's High Court after losing an appeal against a fart bully. (AAP)

The 56-year-old applied to appeal the case, saying "flatulence was a form of bullying" and his ex-colleague Greg Short was a serial farter.

The Court of Appeal ruled against Mr Hingst today, refusing to grant him leave to appeal and ordering him to pay the defendant's legal costs.

"The application will be refused, with costs," Justice Phillip Priest said.

In response, Mr Hingst promised to take the case to the nation's top court.

"I'm taking it to the High Court," he told the judges.

Mr Hingst did not speak to reporters as he left court, with an item of clothing held over his mouth and face.

On Monday, Mr Hingst gave details of the alleged bullying, saying Mr Short would come into his small, windowless office several times a day and break wind.

"He would fart behind me and walk away. He would do this five or six times a day," he told AAP outside court.

David Hingst claimed a colleague at his former place of work, Construction Engineering would 'thrust his bum' and fart multiple times in Mr Hingst's presence. (Getty Images/iStockphoto)

He also said Mr Short had abused him over the phone, used profane language and at times taunted him with gestures.

"He thrusted his bum at me while he was at work," Mr Hingst told the judges.

Mr Hingst, who has represented himself throughout the 18-day trial and the appeal process, sought leave to appeal on several grounds.

He claimed he didn't get a fair trial as he felt under pressure from Supreme Court Justice Rita Zammit when questioning witnesses, and felt the judge was biased against him.

Workplace bullying claimant David Hingst covers his face as he leaves the Court of Appeal in Melbourne today. (AAP)

But Justice Priest on Monday said the judge seemed to show "remarkable latitude" to Mr Hingst during the trial.

Mr Hingst said he suffered a psychological injury as a result of the bullying and has not returned to work since he was dismissed from Construction Engineering a decade ago.

His $1.8 million claim includes compensation for lost past and future earnings, having previously earned a salary of about $100,000 for his design and engineering work on building projects.