Give her a present — or else!

A Pennsylvania woman stabbed her boyfriend with a box cutter and threatened to kill him because he failed to get her a birthday gift, according to a report Friday.

Georgia Zowacki had been drinking vodka on her 55th birthday Wednesday when she allegedly stormed into her live-in beau David Rea’s room in West Newton, slashed his arm and held the weapon to his throat, police told the Pittsburgh Post-Gazette.

Rea, who met Zowacki two months ago, had taken her out for a meal earlier in the day — but didn’t buy her a gift, card or cake, cops told the paper.

“She stabs me four times. Then she went to my neck and said, ‘I’m going to kill you,’ ” Rea told cops, according to ctpost.com. “She got very belligerent.”

Zowacki was also furious that nobody else had gotten her a gift, according to the paper.

During the attack, she allegedly trashed his room, smashed his television and bolted, according to the paper.

She was charged with aggravated assault and making terroristic threats.