The mother of a 12-year-old boy who was filmed abusing police officers during his arrest in Sydney’s west has defended her son’s actions.

The woman told 9NEWS her child, who can be heard calling officers “redneck motherf-----rs”, “dumb dogs” and a “stupid pig”, was constantly targeted by police and simply defending himself.

“If my son’s in the wrong, I’ll stand there and tell you he’s in the wrong, but if he’s in the right, I’ll stand there and fight for him”, she said.

Police were arresting the boy in December last year in Lethbridge Park, near Mount Druitt, for allegedly throwing rocks at buses.

The video was filmed by his mother, who has two other sons, and uploaded to Facebook.

“You’ve been involved in throwing rocks at passing vehicles, as well as causing damage to two different bus windows,” a police officer in the video says.

During the video the boy can be heard swearing constantly and walking erratically.

“Stop swearing, settle down”, an officer can be heard saying.

The boy has since been charged over the alleged incident with the buses and will face the children’s court in March.

The boy’s mother said she was concerned for the safety of her son and felt her family was targeted because they were stereotypes.

“It’s constant harassment, everywhere he goes. I’m over it, I’m sick of it. I’m way sick of it. They aren’t the greatest kids in the world, but they’re my kids, and I’ll stick up for my kids,” she said.

“I cried my f-----g eyes out. I’m sick of my son being picked on by authority.”

She also denied her son had thrown rocks and said she was proud of her son’s actions because she felt he had stood up for himself.

“He’ll stand the ground for himself. You don’t hear the good things these kids do. It’s just stereotypical Mount Druitt.”