A restaurant worker on a smoke break in The Bronx was slashed in the neck by a thug after refusing to share a cigarette with him.

Muhammed Rashid had stepped outside of the Subway sandwich shop where he works on East 161st Street, one block from Yankee Stadium, at around 3:40 p.m. with one of his Marlboro Lights.

The thug, dressed entirely in black, approached menacingly and asked to bum a cigarette.

“I told him it was my last one,” Rashid, 28, recalled to The Post from his hospital room.

“He started yelling, saying, ‘You lie!’ ”

The brute, who had been arguing with a woman walking with him, asked her to hold his Nike book bag.

“She was like, ‘No, I’m not going to hold your bag. You’re going to cut me, too,’ ” said witness Lenny Martinez, 27.

The man threw the bag on the ground, and seconds later, Rashid was cut.

“I didn’t realize what happened. For a moment, I was unconscious,” Rashid recalled.

He was taken to Lincoln Hospital in stable condition.

The slasher fled.