Radio commentator Ray Hadley has been found to have defamed a north-west Sydney fish and chip shop owner, whom he described as "vile" and "a grub" during his morning radio show.

On Monday, a four-person defamation jury found Hadley had damaged the reputation of Kim Ahmed, whom he attacked for continuing to support her husband, Emran Ahmed, after he had been convicted of indecently assaulting a 17-year-old girl.

Found to have defamed woman: Ray Hadley. Credit:Ben Rushton

Mrs Ahmed also incurred the commentator's ire for taking out an AVO against the girl's father, whom she accused of stalking her.

"If this bloke [Emran Ahmed] has any connection with [the fish shop] and his grub of a wife, they should completely and utterly be sent out of business," Hadley told 2GB listeners.