Manhattan

A 14-year-old boy was slashed in the head, ear and neck during a brawl between teenage gangs from rival housing projects that lasted more than an hour and tied up Harlem traffic, cops and residents said.

The boy, who sustained his injuries at about 8:20 p.m. Sunday, was in stable condition last night at St. Luke’s Hospital, police said.

Dozens of teens from the Manhattanville and General Grant houses, near West 125th Street and Amsterdam Avenue, clashed at about 7 p.m. and just kept at it, residents said.

“At one point, there were so many kids fighting in the street that traffic was blocked,” said a merchant who declined to give his name.

No arrests had been made as of last night.

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A 20-year-old man jumped to his death off the George Washington Bridge yesterday afternoon, authorities said.

He leaped from a foot path on the south side of the bridge and landed on Riverside Drive, some 200 feet below, at about 1:20 p.m., according to a Port Authority spokesman.

“All of a sudden, he did a flip, like a gymnast,” said a witness, a retired cop who declined to give his name. “He must have changed his mind, because after he flipped himself over, he was hanging there by one hand. He only hung on for five seconds.”

He died of his injuries at New York Presbyterian Hospital/Columbia University Medical Center shortly before 1:50 p.m., the PA spokesman said.

The Bronx

An alleged prostitute was busted for offering oral sex to an undercover cop in Claremont Village, officials said.

Jenny Gonzalez, 30, propositioned the officer as he sat in an unmarked car on East 172nd Street at 12:48 a.m. May 19 by telling him, “It’s $20 for [that] and $40 to f–k,” according to court records.

She was charged with one count of prostitution.

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A woman stormed out of a car after the driver repeatedly yelled, “You bitch!” at her — and he responded by slamming the vehicle into her and dragging her for half a block, authorities said.

Kadeem Sykes, 21, lost it at 6:15 p.m. May 19 on Woodycrest Avenue and West 162nd Street in Highbridge, court records say.

The woman suffered injuries to both legs.

A still-seething Sykes was arrested and charged with reckless endangerment, resisting arrest and disorderly conduct.

Brooklyn

A seemingly intoxicated young man was fatally struck by a van yesterday morning in Crown Heights, police sources said.

He was standing in the middle of Eastern Parkway near Schenectady Avenue at about 8:40 a.m. when the white 1998 Ford van, heading west, slammed into him, the sources said.

The driver, a 42-year-old man, stayed at the scene. Police said no criminality was suspected.

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A Williamsburg man claims he was scammed out of $5,400 while trying to buy a car on Craigslist, authorities said.

The car buyer, 24, was in his South Fourth Street apartment when he found an ad that sounded promising, sources said.

He e-mailed the seller, who got him to wire the money through Western Union — before the victim saw the car.

The seller then stopped answering his e-mails.

Investigators were checking out a possible Jersey City address, but there had been no arrest as of last night.

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More than his pride was wounded.

A 38-year-old Kensington resident gallantly confronted a stranger who had a made lewd remark about his girlfriend — and wound up shot in the butt Saturday in Sheepshead Bay, cops said.

The couple was strolling on Avenue W near Nostrand Avenue at about 1 a.m. when two men approached them.

One just had to say something fresh, sparking a confrontation that kept escalating until one of the men pulled a gun and opened fire, hitting the boyfriend in his left leg and buttocks.

He was treated at Lutheran Medical Center and, as of last night, was expected to survive.

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An apologetic stranger sat beside two teens on a park bench in Williamsburg, showed them a gun wrapped in a black bandanna and calmly said, “I’m always hungry. Don’t get up. Don’t move,” cops said.

The scene played out at about 8 a.m. on May 14 in Sternberg Park on Boerum Street, cops said.

The boys, ages 14 and 15, handed over their Samsung and T-Mobile cellphones and $10 in cash.

The stranger got up to leave with his loot, then turned back to say, “You know how hard it is to make money on the street.”

He was described as 6 feet tall and was wearing a blue baseball cap and tan slacks when last seen.

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A 27-year-old woman returning to her Williamsburg home after visiting her mother discovered her jewelry and camera missing, cops said.

She entered her apartment on Havemeyer Street near Metropolitan Avenue at midnight on May 20 and soon noticed that someone had broken in and made off with her silver Michael Kors watch, worth $375, antique silver ring, worth $3,000, and Canon camera, worth $200, the cops said.

Investigators, figuring the thief came in through an unlocked bedroom window, were looking into a footprint left on a metal chair.