A Long Island teen was slapped with murder charges in the stabbing death of a 15-year-old during an out-of-control house party full of as many as 100 rowdy youngsters, Suffolk County police said .

The accused killer, whose name was not released because he is a minor, allegedly stabbed and killed Liam Delemo during a Nov. 3 scuffle at the West Babylon home of a 70-year-old grandmother.

“Between 90 and 100 teenagers were at a party outside the home at 813 Carlton Road on November 3 at approximately 10:25 p.m. when a fight broke out and Liam Delemo was stabbed,” police said in a press release Monday.

“Delemo, 15, of West Babylon, was transported to Good Samaritan Hospital Medical Center in West Islip, where he was pronounced dead,” the release added.

Homeowner Bonnie Miranda was arres

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