A brave Oklahoma 7-Eleven clerk was fired for shooting a customer, who tried to strangle her and threatened to “slice her head off” — because she used her own gun, violating the convenience store’s policy.

Stephanie Dilyard, 25, said she was working alone at the Oklahoma City 7-Eleven just after midnight on Nov. 14 when a man came in and tried to pay for a trove of junk food with a counterfeit $100 bill, KOKH reported.

The mother of three said that when she called the man out on the bill being bogus, he began threatening her and became erratic.

“He threatened me, and said he was gonna slice my head off, and that’s when I tried to call the police,” she recalled.

Dilyard said the brute started hurling objects at her before he rushed behind the counter and put his hands on her.

“I tried to run off, but he grabbed his hands around my neck, and pushed me out of the counter space, and that’s when I pulled out my gun and I shot him,” she said.

The suspect, Kenneth Thompson, fled the store after he was shot in the stomach. The 59-year-old made it a few blocks away from the 7-Eleven before calling 911.

The alleged violent fraudster was taken into custody at the hospital and charged with assault and battery, threatening acts of violence, attempting to pass counterfeit currency, and violating parole on an outstanding felony warrant.

Investigators ruled that Dilyard’s actions were justified under Oklahoma’s stand-your-ground law, which allows people to use deadly force when confronting an imminent threat of death or serious harm.

While authorities have cleared the 25-year-old mom, her employer fired her just days after the frightening ordeal on Nov. 17.

“They said that they were going to separate from employment because of a violation of policy,” Dilyard, who had been working the overnight shift alone from 11 p.m. to 7 a.m. for more than two years, said.

Dilyard, who still had a scratch on her neck and burn marks on her finger from firing the gun, told the outlet that all she cared about when she was getting attacked was getting home to her kids.

“This was a situation where I felt like I was put into a corner between choosing between my job, and my life, and I’m always going to choose my life because there’s people that depend on me. Just, I’m going, I’m going home, you know. I need to be here for my kids,” she said.

She hopes what she endured will drive changes that better protect clerks — especially women — and ensure they aren’t afraid to defend themselves when facing a life-or-death threat.

“If I’ve known that there’s a potential that somebody is for real on taking my life away that I will do whatever it takes, and I hope that women see that, and they’ll do the same thing,” she said.

“You have a right to defend yourself.”

Since losing her job, Dilyard has launched a GoFundMe to help her family with expenses while she’s out of work and said she had zero regrets for defending herself.

“We have no security, and we are not allowed to carry self defense weapons, including mace,” she wrote. “That’s is why I decided to carry in the first place.”

“I never expected for me to be in this situation, but I did what I had to do to go home to my kids. I was a good employee, committed and determined, but in-between a rock and a hard place I had to make a quick decision—lose my life, or lose my job,” she added.

The Post has reached out to 7-Eleven for comment.