Disgusting video shows a teen slamming a girl to the ground and stomping on her head after she refused to give him her phone number, according to police and sources.

Video circulating on social media shows the 14-year-old brute confronting the 15-year-old girl on the corner of East 107th Street and 3rd Avenue in East Harlem around 3:30 p.m. Monday after school got out.

“I’ll knock the s–t out of you right now,” the bully says as he blocks the girl’s path in the crosswalk, while one of his pals eggs him on to “Do it!”

“You stand right here,” he orders her, pointing at the ground at his feet.

She tries to go around him but he puts an arm out and pushes her back, the tense clip shows.

“Get the f—k away from me, p—y,” she tells him, turning around and walking away.

The masked goon then grabs her from behind, picks her up in the air and slams her into the pavement, according to the video.

While she lies on the ground helplessly in pain, he stomps on her head and walks away.

The girl suffered a concussion and was taken by EMS to Harlem Hospital in stable condition, police and sources said.

The bully was arrested and charged with assault. He’s due to appear in family court on Thursday, sources said.