Two heartless cops forced a mentally challenged janitor at their precinct station house to put on a T-shirt that read, “I’M DOPE” — then cruelly laughed as they snapped a photo of her, a Bronx lawsuit charges.

“They asked me if I could read it, and I said that I couldn’t read,’’ a hurt and embarrassed Hannah Biggan, 53, said in a deposition ­obtained by The Post.

“I tried to read it, but I couldn’t.”

“When I got home, my sister Maryann told me what it said . . . And I got really depressed and ­angry at them for doing that to me because I’ve never done anything bad to them.”

Biggan — who loyally worked at the 52nd Precinct station house for 23 years — became suicidal ­after the May 2013 incident and had to go on leave for so long that she’s no longer being paid or getting benefits, the suit says.

The handicapped woman admitted during her deposition that she had never heard of the saying before but that once she was told what the shirt said, she thought it meant “kind of, like, I was stupid.”

“I wanted to hurt myself. I did think of ways to do it, like, get hit by a car,’’ said the woman, who also has a speech impediment and walks with a “pronounced limp’’ because of a metal plate in her knee. Her discrimination lawsuit targets the city, the two officers — Nicholas Konner and John Repetti — and Biggan’s supervisor.

Biggan, who lives with her sister, painfully describes in her suit how Konner first greeted her with the overly large 3XL shirt as she arrived for her morning shift at the Norwood station house on May 20, 2013.

Konner told her a rapper had given it to him but that it was too big, the suit says. Under “I’M DOPE’’ are the words “@cashcowmovement,’’ referring to the rapper Cash Cow.

Biggan put the shirt in her locker and went back to work — not knowing she was being ridiculed, the suit says. Later that afternoon, Konner and Repetti allegedly told her to get the shirt and put it on.

Repetti then used his cellphone to snap a photo of her standing alongside Konner, as both men laughed, the suit says.

After she went home and told her sister about the incident, her furious sibling reported it to Biggan’s supervisor, who did nothing, the suit says.

Biggan’s lawyers — Michael Borrelli, Alexander Coleman and Todd Dickerson — filed suit in Bronx Supreme Court.

Repetti declined to comment. Efforts to reach Konner were unsuccessful.

The city’s Corporation Counsel said in a statement Thursday, “We will evaluate the case based upon the facts we learn in discovery.”